MURI
Materials with Extraordinary Spin/Heat Coupling
Link List
We are developing and exploring new materials with extraordinary thermal properties based on spin. The recent demonstration of high magnon thermal conductivity at room temperature and the observation of a new thermo-transport effect called the spin-Seebeck effect (SSE) indicate significant opportunities for breakthrough research, uncovering new pathways to engineer thermal properties and generate spin transport in solids. Such discoveries have potential to impact DoD capabilities through the development of new materials and devices for thermal management and waste heat recovery. Since most energy is lost to heat, even small improvements in managing thermal energy would offer a dramatic increase in energy efficiency. Notably, after only 4 years of its discovery, the magnitude of the SSE was recently increased to ~10mV/K, comparable to the largest classical Seebeck coefficients. Thus, with improved understanding of the underlying mechanism of SSE, the anticipated outcome is a new pathway to optimize thermal energy conversion devices that could surpass charge-based thermoelectrics.
The multidisciplinary team of researchers combines the materials science and physics of thermal transport, magnetism, and spin-physics. Led by The Ohio State University, the team also includes University of California at Los Angeles, University of Texas - Austin, University of Illinois - Urbana Champaign, and University of Chicago, The current activities include development of new epitaxial magnetic materials and structures towards understanding SSE mechanisms, expanding and refining theories on interface spin conductance and magnon-phonon drag interactions, and predicting new materials to enhance spin/heat coupling phenomena to help guide experiments.
The MURI is a five year multidisciplinary university research initiative funded by the Army Research Office (ARO). It represents the first large team effort in the US focused on spin caloritronics. The initiative officially began in March 2014 is jointly managed by Dr. Chakrapani Varanasi (ARO) and Dr. Mark Spector (ONR), and is led by Dr. Roberto Myers (OSU).
Internal Share
Meetings
4th Annual Review meeting of MURI: Materials with Extraordinary Spin/Heat Coupling
DATE: March 21, 2018 (8:00am to 4:30pm)
LOCATION: The Ohio State University, Nanotech West Lab
1381 Kinnear Rd, Columbus, OH 43212
VENUE: Materials Innovation Lab, Room 218, (directions)
The goal of the MURI is to develop the basic physics of spin-heat interactions by determining the coupling mechanisms between heat and spin carrying particles. Along these lines, in the ferrimagnetic insulator, YIG, the MURI team developed theory to explain coupled spin-heat transport. Temperature, time, and spatially resolved spin-heat transport experiments were used to observe the length scales and time scales of spin and heat flux both in the bulk of YIG as well as across interfaces to metals. These provide a deeper understanding of the spin Seebeck physics and its relation to the properties of magnons and phonons in this class of materials. Moving beyond ferromagnetic insulators, the MURI team is probing the electron-phonon and electron-magnon coupling in ferromagnetic metals (Co and CoFeB) and evaluating the applicability of the two and three temperature models. We are also examining spin/heat coupling in antiferromagnets (MnPS3 and MnTe), where using theoretical concepts developed for YIG, we expect very large thermally-driven spin-transport.
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Wednesday March 21, 2018 |
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8:00 am |
Breakfast & Poster Setup |
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8:45 am |
Welcome Remarks |
Prof. Roberto Myers The Ohio State University |
9:00 am |
Collective spin dynamics in ferri- and antiferromagnets
I will summarize our recent work on spin dynamics in ferrimagnets, with a focus on the vicinity of the angular momentum compensation point. Here, fast dynamics of domain walls, vortices, and other magnetic solitons is expected and has been recently observed. Magnetoelectric (as well as magnetothermal) effects, furthermore, may allow for efficient manipulations of such solitons. Finally, I will discuss the improved understanding of the spin Seebeck physics, following recent OSU experiments that demonstrated the interplay of the spin-relexation and energy-relaxation length scales in the ferrimagnetic insulator YIG.
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Prof. Yaroslav Tserkovnyak University of California Los Angeles |
9:30 am |
Spins in nanoparticle arrays for magnon transport and thermal imaging on YIG
The nitrogen-vacancy (NV) in diamond shows promise as a quantum sensor and a spin qubit for quantum computation applications due to its atom-like nature that results in high sensitivity to its local environment. We will discuss our current and ongoing work exploring the interplay between the NV center system and ferromagnetic excitations in yittrium-iron-garnet (YIG) using a direct assembly technique to create arrays of diamond nanoparticles on a transferable film. In particular, we explore the direct interaction between spin waves generated in the YIG and the NV center spin, and take advantage of the sensing capabilities of the NV center to investigate the nanoscale details of heat transport. We will also discuss new efforts in modeling and fabricating magnonic waveguides to mediate NV center coupling through spin waves.
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Dr. Joseph Heremans University of Chicago |
10:00am |
Break |
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10:30am |
Probing Spin-Hall Injection of Magnon Population and Energy into a Magnetic Insulator
Analogous to the corresponding properties of charge carriers in semiconductor devices, the density, energy, and spin diffusion lengths of magnons in a magnetic insulator (MI) are important quantities for emerging spintronic devices. Here, we introduce lock-in Brillouin light scattering and resistance-thermometry measurements as sensitive probes of these properties of magnons injected by the spin Hall effect (SHE) from a normal metal, platinum, into a prototypical MI, yttrium iron garnet (YIG). Analytical models of the measurements are established to find that the SHE is capable of injecting magnons with an appreciable energy flux and a density as high as the typical carrier density in doped semiconductors. The ability to quantify magnon injection into a MI by the SHE and other mechanisms can enable future-generation MI-based spintronics.
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Sean Sullivan, University of Texas - Austin |
11:00am |
Long lifetime of thermally-excited magnons in bulk YIG
When heat flows in YIG, it generates a bulk spin current composed of a thermal magnon cloud, described by the magnon chemical potential. I will discuss transient opto-thermal measurements of the time evolution of the magnon chemical potential in YIG, which evolves on time scales ranging from ~2 ns to ~1 ms. By fitting the data to the coupled heat/spin transport equations, using finite element method, the lifetime of the magnon chemical potential can be determined. Microsecond lifetimes of thermally excited magnons in YIG are surprisingly long and consistent with low energy magnons. I will also discuss the relative magnitude of the interface versus bulk component of the spin current in spin Seebeck and its variation with temperature. Apparently, the bulk spin current drives the majority of the detected signal in bulk YIG.
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John Jamison, The Ohio State University |
11:30am |
Lunch (provided with registration) |
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1:00pm |
Hot electron diffusion, electron-magnon coupling, and ultrafast thermal response of metallic ferromagnets
The exchange of thermal energy between the various excitations of a solid (phonons, electrons, magnons) plays a foundational role in the field of spin caloritronics. I will describe our recent experiments on a simplified metallic multilayer structure designed to enable better measurement of electron-phonon and electron-magnon coupling parameters in metals. The experimental design consists of a single 0.7 nm magnetic layer placed within a thin (typically 50 nm thick) non-magnetic metal layer near the Pt/substrate interface. In the current experiment, the magnetic layer is either Co or CoFeB, and the non-magnetic layer is Pt. Through a combination of time-domain thermoreflectance and time-resolved magneto-optic Kerr effect measurements with picosecond time resolution, we determine the effective values of the coupling parameters that describe the transport of thermal energy in these system and evaluate the applicability of two and three-temperature models. |
Prof. David Cahill University of Illinois – Urbana Champaign |
1:30pm |
Magnon drag thermopower of antiferromagnetic and paramagnetic MnTe
Magnon-drag enhances the thermopower of ferromagnetic and antiferromagnetic metals, typically by one order of magnitude over the conventional diffusion thermopower. Under the MURI, both a hydrodynamic and a spin-dynamic model of magnon drag effects have been developed for ordered magnetic materials. They predict that the magnon drag thermopower is proportional to the magnon specific heat and inversely proportional to the total number of free electrons. We report here the thermopower of the degenerately-doped antiferromagnetic semiconductor MnTe, as a function of both the temperature and the carrier concentration (which is varied by aliovalent doping with Li). Based on the results of specific heat and Hall measurements, we calculate the diffusion thermopower and magnon drag thermopower. The calculation agrees well with the experiment in the antiferromagnetic regime below the Neel temperature (TN=310K), provided the total experimental magnetic specific heat is used as opposed to only the magnon specific heat. Surprisingly, an excess thermopower is also observed in the paramagnetic regime up to 900 K, where it allows optimally doped MnTe:Li to reach a ZT ~ 1. Phenomenologically, we note that this excess thermopower scales as the Dulong-Petit value of the magnetic degree of freedom of the Mn ions divided by the carrier concentration. This suggests that short-range thermal fluctuations of the local magnetization may be responsible for the large thermopower, since the lifetime of these fluctuations is expected to be much longer than the interaction time between them and conduction electrons. The result reinforces other recent observations of the presence of thermally-driven spin fluxes in disordered spin systems, such as by Spin-Seebeck measurements in paramagnets.
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Prof. Joseph Heremans The Ohio State University |
2:00pm |
Break (PIs and program managers meeting) |
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2:30pm |
Poster Session |
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4:00pm |
Adjorn |
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<p>MURI 3rd Annual Review meeting: Materials with Extraordinary Spin/Heat Coupling</p>
<p> </p>
<p>DATE: January 31, 2017 (8:30am to 5pm)</p>
<p>LOCATION: 201 W 19th Ave, Columbus, OH 43210</p>
<p>VENUE: E100 Scott Laboratory, The Ohio State University </p>
<p> </p>
<p>The goal of the MURI is to develop the basic physics of spin-heat interactions by determining the coupling mechanisms between heat and spin carrying particles. To that end, over the last three years, the MURI team has realized key accomplishments. The measurement of magnon and phonon coupling in YIG and the measurement of non-local magnon spin-diffusion in YIG provide concrete quantitative observations that help refine the theoretical proposals that use the bulk spin Seebeck effect to induce Bose-Einstein condensation of magnons in a magnetic insulator. The mechanisms governing advective (drag effect) thermal transport processes were identified, whereby thermal gradients drive spin fluxes which in turn interact with electrons, either across an interface within a composite or within a single bulk metal. Thermally generated spin currents have the potential for more energy efficient data storage devices. Work in the MURI quantified for the first time the magnitudes and picosecond time-scales of spin currents generated by ultrafast heat currents and temperature excursions. The accomplishments of this work provide design rules that will aid the search for materials with stronger spin-heat coupling. Inelastic neutron scattering in spin ladder compound revealed extremely high velocity magnon modes and their weak coupling with the acoustic and pseudoacoustic phonons, which explains the high magnon thermal conductivity observed in this compound. Furthermore, we demonstrate ferromagnet-mediated coherent control of local spins in a hybrid YIG/nanodiamond system that enable efficient as site-specific probes of magnons. Surprisingly, surface spin waves propagating in YIG films generate a 100-fold amplification of the microwave signals interacting with nanodiamond sensors. Spin-wave mediated coherent control of the diamond spins constitutes a fundamental advance towards long-range quantum sensing of phonon-magnon interactions. These discoveries offer new insights for designing materials with a high magnon thermal conductivity.</p>
DATE: March 18, 2016 (8:30am to 5pm)
LOCATION: 301 West Lombard St Baltimore, Maryland 21201
VENUE: Holiday Inn Inner Harbor – Baltimore Downtown
Over the past year the MURI team has probed a deeper theoretical understanding of spin-thermal phenomena, which are revealed through experimental measurements applied to carefully designed materials systems. Highlights to be discussed include the theoretical and experimental understanding of advective magnon transport phenomena such as magnon-electron and phonon-magnon drag, measurement of phonon-magnon coupling, theoretical predictions of superfluid spin transport, measurement of long-range magnon spin diffusion, development of cryogenic microscale thermometry using diamond spins, and observation of the picosecond dynamics of spin-heat coupling phemomena. This collaborative project aims to tackle the big questions on the coupling and scattering processes that underlie heat-spin interactions in magnetic materials. Such research aims at developing new materials and devices for spin-heat conversions with potential applications in thermal management and waste heat recovery.
DATE: March 11, 2015
LOCATION: 2200 Broadbirch Drive, Silver Spring, Maryland, 20904, USA
VENUE: Hilton Garden Inn - Silver Spring North
September 16 – 17, 2015 at The Ohio State University in Columbus, Ohio
Continue to check this page as it will be updated as details become available and speakers are confirmed.
Workshop on Non-linear spin-heat interactions
Dates: September 16th-17th, 2015
Location: Ohio State University, Columbus, Ohio
Host: Roberto Myers
Confirmed invited speakers:
- Gerrit Bauer, TU Delft & Tohoku University
- David Cahill, University of Illinois – Urbana Champaign
- Anna Delin, Royal Institute of Technology, KTH, Stockholm
- Michael Flatté, University of Iowa
- Joseph Heremans, Ohio State University
- Sadamichi Maekawa, Japanese Atomic Energy Agency
- Alexander Serga, TU Kaiserslautern
- Li Shi, University of Texas – Austin
- Yaroslav Tserkovnyak, University of California – Los Angeles
- Kenichi Uchida, Tohoku University
- Wolfgang Windl, Ohio State University
- Stephen Wu, Argonne National Lab
- Barry Zink, University of Denver
Click here to see the current workshop program.
Conference Location
Scott Laboratory
The Ohio State University
201 W. 19th Avenue,
Columbus, Ohio 43210
Hotel Accommodations
Homewood Suites by Hilton® Columbus/OSU, OH
1576 West Lane Avenue, Columbus,Ohio, 43221
USATEL: +1-614-488-1500; FAX: +1-614-488-1501
Hotel rooms are available at The Homewood Suites for $159/night. Please reference the “Spin Caloritronics Workshop” group code/ID: SCW when making your reservation via phone or online.
Questions?
Angie Dockery
IMR Business Manager
614-247-4670 | Fax: 614-247-2581
dockery.9@osu.edu
Publications
Supported work will contain the acknowledgement, "Work supported by the Army Research Office MURI W911NF-14-1-0016."
2019
M. Fukami, C. G. Yale, P. Andrich, X. Liu, F. J. Heremans, P. F. Nealey, & D. D. Awschalom, “All-optical cryogenic thermometry based on NV centers in nanodiamonds”, Arxiv. 1903.01605 (2019).
Brian B. Zhou, Paul C. Jerger, Kan-Heng Lee, Masaya Fukami, Fauzia Mujid, Jiwoong Park, & David D. Awschalom, “Spatiotemporal Mapping of Photocurrent in a Monolayer Semiconductor Using a Diamond Quantum Sensor”, Arxiv.1903.09287 (2019).
John S. Jamison, Brelon J. May, Julia I. Deitz, Szu-Chia Chien, David W. McComb, Tyler J. Grassman, Wolfgang Windl, & Roberto C. Myers, “Ferromagnetic Epitaxial mu-Fe2O3 on beta-Ga2O3: A New Monoclinic form of Fe2O3”, Arxiv.1901.04844 (2019).
Takaya Okuno, Duck-Ho Kim, Se-Hyeok Oh, Se Kwon Kim, Yuushou Hirata, Tomoe Nishimura, … Teruo Ono, “Spin-transfer torques for domain walls in antiferromagnetically coupled ferrimagnets”, Arxiv.1903.03251 (2019).
Xi Chen, Jesús Carrete, Sean Sullivan, Ambroise van Roekeghem, Zongyao Li, Xiang Li, Jianshi Zhou, Natalio Mingo, and Li Shi. “Coupling of Spinons with Defects and Phonons in the Spin Chain Compound Ca2CuO3”, Physical Review Letters 122, 185901 (2019).
Yuushou Hirata, Duck-Ho Kim, Se Kwon Kim, Dong-Kyu Lee, Se-Hyeok Oh, Dae-Yun Kim, Tomoe Nishimura, Takaya Okuno, Yasuhiro Futakawa, Hiroki Yoshikawa, Arata Tsukamoto, Yaroslav Tserkovnyak, Yoichi Shiota, Takahiro Moriyama, Sug-Bong Choe, Kyung-Jin Lee, & Teruo Ono, “Vanishing skyrmion Hall effect at the angular momentum compensation temperature of a ferrimagnet”, Nature Nanotechnology 14, 232–236 (2019).
Ji Zou, Se Kwon Kim, & Yaroslav Tserkovnyak, “Topological transport of vorticity in Heisenberg magnets”, Physical Review B 99, 180402 (2019).
Qiming Shao, Yawen Liu, Guoqiang Yu, Se Kwon Kim, Xiaoyu Che, Chi Tang, … Kang L. Wang, “Topological Hall effect at above room temperature in heterostructures composed of a magnetic insulator and a heavy metal”, Arxiv.1904.07107 (2019).
Se Kwon Kim, Kouki Nakata, Daniel Loss, & Yaroslav Tserkovnyak, “Tunable Magnonic Thermal Hall Effect in Skyrmion Crystal Phases of Ferrimagnets”, Physical Review Letters 122, 057204 (2019).
Duck-Ho Kim, Takaya Okuno, Se Kwon Kim, Se-Hyeok Oh, Tomoe Nishimura, Yuushou Hirata, … Teruo Ono, “Low Magnetic Damping of Ferrimagnetic GdFeCo Alloys”, Physical Review Letters 122, 127203 (2019).
2018
Yaroslav Tserkovnyak, “Perspective: (Beyond) spin transport in insulators”, Journal of Applied Physics 124, 190901 (2018).
Daniel Hill, Se Kwon Kim, & Yaroslav Tserkovnyak, “Spin-Torque-Biased Magnetic Strip: Nonequilibrium Phase Diagram and Relation to Long Josephson Junctions”, Physical Review Letters 121, 037202 (2018).
Se Kwon Kim, Roberto Myers, & Yaroslav Tserkovnyak, “Nonlocal Spin Transport Mediated by a Vortex Liquid in Superconductors”, Physical Review Letters 121, 187203 (2018).
Paolo Andrich, Jiajing Li, Xiaoying Liu, F. Joseph Heremans, Paul F. Nealey, & David D. Awschalom, “Microscale-Resolution Thermal Mapping Using a Flexible Platform of Patterned Quantum Sensors”, Nano Letters 18, 4684–4690 (2018).
Ricardo Zarzuela, Se Kwon Kim, & Yaroslav Tserkovnyak, “Magnetoelectric antiferromagnets as platforms for the manipulation of solitons”, Physical Review B 97, 014418 (2018).
Suk Bum Chung, Se Kwon Kim, Ki Hoon Lee, & Yaroslav Tserkovnyak, “Cooper-Pair Spin Current in a Strontium Ruthenate Heterostructure”, Physical Review Letters 121, 167001 (2018).
John S. Jamison, Zihao Yang, Brandon L. Giles, Jack T. Brangham, Fengyuan Yang, & Roberto C. Myers, “Long lifetime of thermally-excited magnons in bulk yttrium iron garnet”, Arxiv. 1803.01054 (2018).
Arati Prakash, Benedetta Flebus, Jack Brangham, Fengyuan Yang, Yaroslav Tserkovnyak, & Joseph P. Heremans, “Evidence for the role of the magnon energy relaxation length in the spin Seebeck effect”, Physical Review B 97, 020408 (2018).
2017
Brandon L. Giles, Zihao Yang, John S. Jamison, Juan M. Gomez-Perez, Saül Vélez, Luis E. Hueso, … Roberto C. Myers,"Thermally driven long-range magnon spin currents in yttrium iron garnet due to intrinsic spin Seebeck effect", Physical Review B 96, 180412 (2017).
Zihao Yang, Emilio A. Codecido, Jason Marquez, Yuanhua Zheng, Joseph P. Heremans, & Roberto C. Myers,"Scalable Nernst thermoelectric power using a coiled galfenol wire", AIP Advances 7, 95017 (2017).
Haoran Man, Zhong Shi, Guangyong Xu, Yadong Xu, Xi Chen, Sean Sullivan, … Pengcheng Dai,"Direct observation of magnon-phonon coupling in yttrium iron garnet", Physical Review B 96, 100406 (2017).
Se Kwon Kim, & Yaroslav Tserkovnyak,"Magnetic Domain Walls as Hosts of Spin Superfluids and Generators of Skyrmions", Physical Review Letters 119, 47202 (2017).
Pramey Upadhyaya, Se Kwon Kim, & Yaroslav Tserkovnyak,"Magnetic Domain Wall Floating on a Spin Superfluid", Physical Review Letters 118, 97201 (2017).
Se Kwon Kim, Kyung Jin Lee, & Yaroslav Tserkovnyak,"Self-focusing skyrmion racetracks in ferrimagnets", Physical Review B 95 (2017).
Kouki Nakata, Se Kwon Kim, Jelena Klinovaja, & Daniel Loss,"Magnonic topological insulators in antiferromagnets", Physical Review B 96 (2017).
Se Kwon Kim, Oleg Tchernyshyov, Victor Galitski, & Yaroslav Tserkovnyak,"Magnon-induced non-Markovian friction of a domain wall in a ferromagnet", Arxiv.org (2017).
Koen Vandaele, Sarah J. Watzman, Benedetta Flebus, Arati Prakash, Yuanhua Zheng, Stephen R. Boona, & Joseph P. Heremans,"Thermal spin transport and energy conversion", Materials Today Physics 1, 39–49 (2017).
B Flebus, GEW Bauer, RA Duine, & Y. Tserkovnyak,"Theory of the magnon-mediated tunnel magneto-Seebeck effect", Physical Review B 96 (2017).
Paolo Andrich, Charles F. de las Casas, Xiaoying Liu, Hope L. Bretscher, Jonson R. Berman, F. Joseph Heremans, … David D. Awschalom,"Long-range spin wave mediated control of defect qubits in nanodiamonds", Npj Quantum Information 3, 28 (2017).
Daniel Hill, Se Kwon Kim, & Yaroslav Tserkovnyak,"Spin analogs of superconductivity and integer quantum Hall effect in an array of spin chains", Physical Review B 95, 180405 (2017).
Sayak Dasgupta, Se Kwon Kim, & Oleg Tchernyshyov,"Gauge fields and related forces in antiferromagnetic soliton physics", Physical Review B 95 (2017).
Bartlomiej Wiendlocha, SunPhil Kim, Yeseul Lee, Bin He, Gloria Lehr, Mercouri G. Kanatzidis, … Joseph P. Heremans,"Eu 2+ –Eu 3+ valence transition in double, Eu-, and Na-doped PbSe from transport, magnetic, and electronic structure studies", Physical Chemistry Chemical Physics 19, 9606–9616 (2017).
Se Kwon Kim, & Yaroslav Tserkovnyak,"Fast vortex oscillations in a ferrimagnetic disk near the angular momentum compensation point", Applied Physics Letters 111 (2017).
C Safranski, I Barsukov, H. K. Lee, T. Schneider, A. A. Jara, A. Smith, … I. N. Krivorotov,"Spin caloritronic nano-oscillator", Nature Communications 8 (2017).
Kab Jin Kim, Se Kwon Kim, Yuushou Hirata, Se Hyeok Oh, Takayuki Tono, Duck Ho Kim, … Teruo Ono,"Fast domain wall motion in the vicinity of the angular momentum compensation temperature of ferrimagnets", Nature Materials 16, 1187–1192 (2017).
Gyung Min Choi, André Schleife, & David G. Cahill,"Optical-helicity-driven magnetization dynamics in metallic ferromagnets", Nature Communications 8 (2017).
Se Kwon Kim, & Yaroslav Tserkovnyak,"Chiral Edge Mode in the Coupled Dynamics of Magnetic Solitons in a Honeycomb Lattice", Physical Review Letters 119, 77204 (2017).
Se-Hyeok Oh, Se Kwon Kim, Dong-Kyu Lee, Gyungchoon Go, Kab-Jin Kim, Teruo Ono, … Kyung-Jin Lee,"Coherent terahertz spin-wave emission associated with ferrimagnetic domain wall dynamics", Physical Review B 96, 100407 (2017).
Xi Chen, Karalee Jarvis, Sean Sullivan, Yutao Li, Jianshi Zhou, & Li Shi,"Effects of grain boundaries and defects on anisotropic magnon transport in textured Sr14Cu24O41", Physical Review B 95, 144310 (2017).
Johannes Kimling, Gyung-Min Choi, Jack T. Brangham, Tristan Matalla-Wagner, Torsten Huebner, Timo Kuschel, Fengyuan Yang, and David G. Cahill, "Picosecond Spin Seebeck Effect", Phys. Rev. Lett. 118, 057201 (2017)
Johannes Kimling and David G. Cahill, "Spin diffusion induced by pulsed-laser heating and the role of spin heat accumulation", Phys. Rev. B 95, 014402 (2017)
2016
Se Kwon Kim, Daniel Hill, and Yaroslav Tserkovnyak, "Mechanical Actuation of Magnetic Domain-Wall Motion", Phys. Rev. Lett. 117, 237201 (2016)
Se Kwon Kim, Héctor Ochoa, Ricardo Zarzuela, and Yaroslav Tserkovnyak, "Realization of the Haldane-Kane-Mele Model in a System of Localized Spins", Phys. Rev. Lett. 117, 227201 (2016)
Benedetta Flebus, Pramey Upadhyaya, Rembert A. Duine, and Yaroslav Tserkovnyak, "Local thermomagnonic torques in two-fluid spin dynamics", Phys. Rev. B 94, 214428 (2016)
Héctor Ochoa, Se Kwon Kim, and Yaroslav Tserkovnyak, "Topological spin-transfer drag driven by skyrmion diffusion", Phys. Rev. B 94, 024431 (2016)
Se Kwon Kim and Yaroslav Tserkovnyak, "Interaction between a domain wall and spin supercurrent in easy-cone magnets", Phys. Rev. B 94, 220404(R) (2016)
B. Flebus, R. A. Duine, and Y. Tserkovnyak, "Landau-Lifshitz theory of the magnon-drag thermopower", EPL 115, 57004 (2016)
Joseph P. Heremans ; Hyungyu Jin ; Yuanhua Zheng ; Sarah J. Watzman ; Arati Prakash, "BiSb and spin-related thermoelectric phenomena", Proc. SPIE 98210I (2016)
Sarah J. Watzman, Rembert A. Duine, Yaroslav Tserkovnyak, Stephen R. Boona, Hyungyu Jin, Arati Prakash, Yuanhua Zheng, and Joseph P. Heremans, "Magnon-drag thermopower and Nernst coefficient in Fe, Co, and Ni", Phys. Rev. B 94, 144407 (2016)
Stephen R. Boona, Koen Vandaele, Isabel N. Boona, David W. McComb, and Joseph P. Heremans,"Observation of spin Seebeck contribution to the transverse thermopower in Ni-Pt and MnBi-Au bulk nanocomposites", Nat. Comms. 7, 13714 (2016)
Johannes Kimling, Gyung-Min Choi, Jack T. Brangham, Tristan Matalla-Wagner, Torsten Huebner, Timo Kuschel, Fengyuan Yang, David G. Cahill, "Picosecond spin Seebeck effect", arxiv:1608.00702 (2016)
Arati Prakash, Jack Brangham, Fengyuan Yang, and Joseph P. Heremans, "Spin Seebeck effect through antiferromagnetic NiO", Phys. Rev. B 94, 014427 (2016)
Xi Chen, Dipanshu Bansal, Sean Sullivan, Douglas L. Abernathy, Adam A. Aczel, Jianshi Zhou, Olivier Delaire, and Li Shi, "Weak coupling of pseudoacoustic phonons and magnon dynamics in the incommensurate spin-ladder compound Sr14Cu24O41", Phys. Rev. B 94, 134309 (2016)
Kyongmo An, Kevin S. Olsson, Annie Weathers, Sean Sullivan, Xi Chen, Xiang Li, Luke G. Marshall, Xin Ma, Nikita Klimovich, Jianshi Zhou, Li Shi, Xiaoqin Li, "Magnons and Phonons Optically Driven Out of Local Equilibrium in a Magnetic Insulator", Phys. Rev. Lett. 117, 107202 (2016)
Se Kwon Kim, So Takei, and Yaroslav Tserkovnyak, "Thermally activated phase slips in superfluid spin transport in magnetic wires", Phys. Rev. B Rapids 93, 020402(R) (2016).
Yaroslav Tserkovnyak, Scott A. Bender, Rembert A. Duine, and Benedetta Flebus, "Bose-Einstein Condensation of Magnons Pumped by the Bulk Spin Seebeck Effect", Phys. Rev. B 93, 100402 (2016)
Se Kwon Kim and Yaroslav Tserkovnyak, "Topological Effects on Quantum Phase Slips in Superfluid Spin Transport ", Phys. Rev. Lett. 116, 127201 (2016)
2015
Se Kwon Kim, So Takei, and Yaroslav Tserkovnyak, "Topological spin transport by Brownian diffusion of domain walls", Phys. Rev. B Rapids 92 220409(R) (2015).
Brandon L. Giles, Zihao Yang, John S. Jamison, and Roberto C. Myers, "Long-range pure magnon spin diffusion observed in a nonlocal spin-Seebeck geometry", Phys. Rev. B 92 224415 (2015).
Hyungyu Jin, Stephen R Boona, Zihao Yang, Roberto C Myers, and Joseph P Heremans, "Effect of the magnon dispersion on the longitudinal spin Seebeck effect in yttrium iron garnets", Phys. Rev. B 92, 054436 (2015).
Se Kwon Kim and Yaroslav Tserkovnyak, "Landau-Lifshitz theory of the thermomagnonic torque", Phys. Rev. B Rapids 92, 020410(R) (2015).
Kim, Se Kwon, Oleg Tchernyshyov, and Yaroslav Tserkovnyak, "Thermophoresis of an antiferromagnetic soliton", Phys. Rev. B 92 020402 (2015).
Kim, Se Kwon, Sumanta Tewari, and Yaroslav Tserkovnyak, "Control and braiding of Majorana fermions bound to magnetic domain walls", Phys. Rev. B 92 020412 (2015).
Scott A. Bender and Yaroslav Tserkovnyak, "Interfacial spin and heat transfer between metals and magnetic insulators", Phys. Rev. B Rapids 91, 140402(R) (2015).
Yaroslav Tserkovnyak, D. A. Pesin, and Daniel Loss, "Spin and orbital magnetic response on the surface of a topological insulator", Phys. Rev. B Rapids 91, 041121(R) (2015).
Johannes Kimling, R. B. Wilson, Karsten Rott, Judith Kimling, Gunter Reiss and David G. Cahill, "Spin-dependent thermal transport perpendicular to the planes of Co/Cu multilayers", Phys. Rev. B 91, 144405 (2015).
Gyung-Min Choi, Chul-Hyun Moon, Byoung-Chul Min, Kyung-Jin Lee, and David G. Cahill, "Thermal spin-transfer torque driven by the spin-dependent Seebeck effect in metallic spin-valves", Nature Physics 11, 576 (2015).
Hyungyu Jin,Oscar D. Restrepo,Nikolas Antolin,Stephen R. Boona,Wolfgang Windl, Roberto C. Myers, Joseph P. Heremans, "Phonon-induced diamagnetic force and its effect on the lattice thermal conductivity", Nature Materials 14, 601-606 (2015).
2014
Johannes Kimling, Judith Kimling, R. B. Wilson, Birgit Hebler, Manfred Albrecht, and David G. Cahill, "Ultrafast demagnetization of FePt:Cu thin films and the role of magnetic heat capacity", Phys. Rev. B 90, 224408 (2014).
Joseph P. Feser, Jun Liu and David G. Cahill, "Pump-probe measurements of the thermal conductivity tensor for materials lacking in-plane symmetry", Rev. Sci. Instrum. 85, 104903 (2014)
Scott A. Bender, Rembert A. Duine, Arne Brataas, Yaroslav Tserkovnyak, "Dynamic phase diagram of dc-pumped magnon condensates", Phys. Rev. B 90, 094409 (2014).
Gyung-Min Choi and David G. Cahill, "Kerr rotation in Cu, Ag, and Au driven by spin accumulation and spin-orbit coupling", Phys. Rev. B 90, 214432 (2014).
"Spin Analogues of Superconductivity and the Integer Quantum Hall Effect in an Array of Spin Chains", arXiv:1701.01509
Team Members
The Ohio State Unversity
Assoc. Prof. Roberto C. Myers (lead)
Prof. Joseph P. Heremans (co-PI)
University of Chicago
Prof. David D. Awschalom (co-PI)
University of Illinois - Urbana Champaign
Prof. David G. Cahill (co-PI)
University of Texas - Austin
Prof. Li Shi (co-PI)
Assoc. Prof. Xiaoqin (Elaine) Li (collaborator)
Prof. Jianshi Zhou (collaborator)
University of California - Los Angeles
Prof. Yaroslav Tserkovnyak (co-PI)
Government:
Dr. Chakrapani Varanasi (ARO) (PM)
Dr. Mark Spector (ONR) (PM)
News
- "Spin caloritronics: Bulk isn't everything", Giacomo Prando, March (2017)
- "Devices that convert heat into electricity one step closer to reality", Matt Schutte, December (2016)
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"Ultrafast heat conduction can manipulate nanoscale magnets", Rick Kubetz, June 8 (2015)
- Phonon-induced diamagnetic force article on cover of Nature Materials, May 20 (2015)
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"Magnetic fields can control heat and sound," Joseph Heremans, March 23 (2015)
- "Precisely placed imperfections key to enhancing performance," Nina Notman,Materials Today, August 12 (2014)
- "Diamond Defect Interior Design," Catherine Meyers, AIP Journal Highlights, August 5 (2014)
- "Advancing the limits for ultrafast nano-devices," ScienceDaily, July 10, (2014)
- "Ultrafast spintronics: Give it a whirl", Karel Carva, Nature Physics, 10, 552–553 (2014).