News
February 2022
The paper "Direct Observation of Fe-Ge Ordering in Fe5−xGeTe2 Crystals and Resultant Helimagnetism" in collaboration with the University of Ulsan, KBSI, KIST, Sungkyunkwan University, KAERI, DGIST has been published in Advanced Functional Materials!
January 2022
"Current-induced spin-wave Doppler shift and attenuation in compensated ferrimagnets" has been published in Physical Review B.
The paper "Unconventional magnetoresistance induced by sperimagnetism in GdFeCo" in collaboration with Kyoto University, University of Ulsan, Chungnam National University, KBSI, Nihon University has been published in Physical Review B.
December 2020
The paper "Quantum hydrodynamics of spin winding" in collaboration with UCLA and CUNY has been published in Physical Review B.
The paper "Relativistic kinematics of a magnetic soliton" in collaboration with MIT and KAIST has been published in Science. See also the perspective "A new spin on special relativity" in Science.
November 2020
Our paper "Magnetic soliton rectifier via phase synchronization," a result of collaboration with KIST, Kyoto University, Korea University, Seoul National University, and KAIST, has been published in Physical Review B!
Our paper "Control of the Half‐Skyrmion Hall Effect and Its Application to Adder–Subtractor," a result of collaboration with multiplet institutions including KRISS, Hanyang University, KIST, Tokyo University, and KAIST, has been published in Advanced Quantum Technologies! Thanks for the nice collaboration.
October 2020
Wooyoun Kim, Seung Ho Lee, and Munsu Jin, gradudate students at KAIST, joined our group! Welcome!
July 2020
Our paper "The dynamics of a domain wall in ferrimagnets driven by spin-transfer torque," a result of collaboration of multiple institutions including Korea University, KIST, KRISS, and KAIST, has been published in Journal of Magnetism and Magnetic Materials! Thanks for the nice collaboration.
Our paper "Enhanced Magnon-Photon Coupling at the Angular Momentum Compensation Point of Ferrimagnets" in collaboration with Kyung-Jin Lee at Korea University has been published in Physical Review Letters! Thanks for the nice collaboration!
June 2020
Our paper "Distinct handedness of spin wave across the compensation temperatures of ferrimagnets" with Chanyong Hwang at KRISS and Kab-Jin Kim at KAIST has been published in Nature Materials! Thanks for the nice collaboration!
The paper "Driving a magnetized domain wall in an antiferromagnet by magnons" with Pengtao Shen and Yaroslav Tserkovnyak has been published in Journal of Applied Physics as a part of the special topic on Antiferromagnetic Spintronics!
Our group has moved to KAIST!
April 2020
The paper "Realization of Su-Schrieffer-Heeger states based on metamaterials of magnetic solitons" in collaboration with Gyungchoon Go and Kyung-Jin Lee at Korea University has been published in Physical Review B!
The paper "SU(3) Topology of Magnon-Phonon Hybridization in 2D Antiferromagnets" in collaboration with Suzy Zhang at UCLA, and Gyungchoon Go and Kyung-Jin Lee at Korea University has been published in Physical Review Letters. Thanks for the nice collaboration!
March 2020
Our paper "Magnetic field control of topological magnon-polaron bands in two-dimensional ferromagnets" has been published in Physical Review B. Congratulations, Pengtao!
The paper "Direct Demonstration of Topological Stability of Magnetic Skyrmions via Topology Manipulation" in collaboration with Soong-Geun Je at Chonnam National University, Mi-Young Im at Lawrence Berkeley National Laboratory, and Jung-Il Hong at DGIST has been published in ACS Nano. Thanks for the nice collaboration!
Here are talks about our works at 2020 APS March meeting in Denver:
(invited) B42.00004 Theory for the unconventional dynamics of ferrimagnets, Presenter: Se Kwon Kim
B59.00004 Magnetic field control of topological magnon-polaron bands in two-dimensional ferromagnets, Presenter: Pengtao Shen
F47.00010 Tuning entanglement by squeezing magnons in anisotropic magnets, Presenter: Ji Zou
M47.00001 Domain wall dynamics in metallic and insulating ferrimagnets, Presenter: Lucas Caretta
W41.00014 Transport signature of the BKT transition in 2D easy-plane magnets, Presenter: Suk Bum Chung
February 2020
The paper “Creating a 100-nm-scale zero-field skyrmion in exchange-biased multilayers through X-ray illumination" in collaboration with Guoqiang Yu at Chinese Academy of Sciences has been published in Nature Communications. Thanks for the nice collaboration!
January 2020
Our News & Views paper "Fast and efficient switching with ferrimagnets" has been published in Nature Electronics! It highlights the recent report "Ultrafast and energy-efficient spin–orbit torque switching in compensated ferrimagnets" by Hyunsoo Yang at NUS and his colleagues published in Nature Electronics.
Our paper "Tuning entanglement by squeezing magnons in anisotropic magnets" has been published in Physical Review B and selected as an Editors' Suggestion! Thanks for the nice collaboration, Ji and Yaroslav. We are moving toward spin-based quantum computation!
December 2019
Our paper "Magnon-Phonon Hybrid Excitations in Square-Lattice Ferromagnets with tunable Chern numbers" in collaboration with Gyungchoon Go and Kyung-Jin Lee at Korea University has been published in Physical Review Letters! Magnon polarons are becoming topological!
November 2019
Our paper "Bidirectional spin-wave-driven domain wall motion in antiferromagnetically coupled ferrimagnets" in collaboration with Se-Hyeok Oh and Kyung-Jin Lee at Korea University and Jiang Xiao at Fudan University has been published in Physical Review B! Thanks for the nice collaboration!
October 2019
Our paper "Electrical manipulation of spin pumping signal through nonlocal thermal magnon transport" in collaboration with Yabin Fan and Luqiao Liu at MIT has been published in Applied Physics Letters! Thanks for the nice collaboration!
September 2019
Our paper "Spin-transfer torques for domain wall motion in antiferromagnetically coupled ferrimagnets" has been published in Nature Electronics! Thanks for the nice collaboration! The research is highlighted in the article "A new twist for spin torques in antiferromagnets" in the same journal.
Our paper "Stabilization of the skyrmion crystal phase in thin-film antiferromagnets" has been published in Physical Review B as a Rapid Communication!
August 2019
The award of Young Investigator Grant of Prof. Se Kwon Kim at UKC2019 has been featured in the Maeil Business Newspaper (written in Korean).
Our paper "Temperature dependence of magnetic resonance in ferrimagnetic GdFeCo alloys" in collaboration with Teruo Ono's group in Kyoto University has been published in Applied Physics Express as a Letter. Thanks for the nice collaboration!
July 2019
The paper "Laser control of magnonic topological phases in antiferromagnets" with Kouki Nakata and Shintaro Takayoshi has been published in Physical Review B. Thanks for the nice collaboration!
June 2019
Prof. Se Kwon Kim joined the Editorial Board of Scientific Reports, an open access journal published by Nature Research!
The single-author paper "Dynamics of bimeron skyrmions in easy-plane magnets induced by a spin supercurrent" has been published in Physical Review B!
May 2019
The paper with Qiming "Topological Hall effect at above room temperature in heterostructures composed of a magnetic insulator and a heavy metal" has been published in Nature Electronics! This research is highlighted in the article "Skyrmions in magnetic insulators warm up" in the same journal by Chun-Yeol You at DGIST in South Korea.
Our paper "Topological transport of vorticity in Heisenberg magnets" with Ji Zou (a graduate student at UCLA) and Yaroslav Tserkovnyak has been published in PRB as a Rapid Communication. Congratulation for your nice paper, Ji!
April 2019
Prof. Se Kwon Kim has been awarded 2019 Young Investigator Grant (YIG) for Science from Korean-American Scientists and Engineers Association (KSEA)! The proposed research program is Superfluid-Inspired Spin Transport with Minimal Dissipation in Magnetic Materials.
March 2019
Our paper "Low magnetic damping of ferrimagnetic GdFeCo alloys" has been accepted for Physical Review Letters. This experimental work address the magnetic damping of GdFeCo, a ferromagnet with the angular momentum compensation temperature where the net angular momentum vanishes. By refuting the previous belief that the magnetic damping of the material diverges at the compensation temperature, we showed that in fact the magnetic damping is small and almost independent of temperature in a wide range spanning the compensation temperature.
Here are talks about our works at 2019 APS March meeting in Boston:
F41.00003 : Nonlocal Spin Transport Mediated by a Vortex Liquid in Superconductors, Presenter: Se Kwon Kim, Time: 12:03 PM, Tuesday, March 5, 2019
K39.00010 : Topological Transport of Vorticity in Heisenberg Magnets, Presenter: Ji Zou, Time: 10:12 AM, Wednesday, March 6, 2019
K41.00007 : Transport signatures of interfacial exchange coupling and chiral spin textures in magnetic insulator thin films, Presenter: Qiming Shao, Time: 9:36 AM, Wednesday, March 6, 2019
January 2019
Our paper "Vanishing skyrmion Hall effect at the angular momentum compensation temperature of a ferrimagnet" has been published in Nature Nanotechnology. This work reports the first experimental observation of vanishing of the spin Hall angle in antiferromagnetically-coupled systems, confirming our theoretical prediction.
Our paper "Domain wall dynamics in easy-cone magnets" has been published in Physical Review B. This work is on the dynamics of a domain wall in easy-cone magnets, which are induced by an external field, spin-transfer torque, spin superfluid. Both analytical and numerical techniques are used for the research.
Our paper "Tunable Magnonic Thermal Hall Effect in Skyrmion Crystal Phases of Ferrimagnets" has been accepted for publication in Physical Review Letters. This work presents a new theory for magnon transport in topological spin-textured ferrimagnets that can include ferromagnets and antiferromagnets as two special cases and shows that the unique tunability of ferrimagnets leads to the new control of magnon transport therein.
September 2018
Our paper "Nonlocal Spin Transport Mediated by a Vortex Liquid in Superconductors" has been accepted for publication in Phys. Rev. Lett. It has been selected as an Editors' Suggestion also Featured in Physics. This work proposes using a superconducting vortex liquid as a robust spin-transport channel. Reciprocally, spin-transport measurements are shown to be able to provide hitherto unaccessible information about an elusive vortex-liquid phase.
Our paper "Cooper-Pair Spin Current in a Strontium Ruthenate Heterostructure" has been accepted for publication in Phys. Rev. Lett. This work exemplifies the promising future research direction, exploring strongly correlated systems by spin-transport measurements.
August 2018
Our paper “Role of dimensional crossover on spin-orbit torque efficiency in magnetic insulator thin films" has been accepted for publication in Nature Communications. Congratulation, Qiming!
June 2018
Our paper "Spin-torque-biased magnetic strip: Nonequilibrium phase diagram and relation to long Josephson junctions" has been accepted for publication in PRL. Congratulation, Daniel!
May 2018
Our paper, "Magnon-induced non-Markovian friction of a domain wall in a ferromagnet," which is coauthored by Yaroslav, Oleg, and Victor, has been published in PRB. Thanks for the nice collaboration!
March 2018
Here are talks about our works at 2018 APS March meeting in Los Angeles:
S19.00008 Chiral Edge Mode in the Coupled Dynamics of Magnetic Solitons in a Honeycomb Lattice, Presenter: Se Kwon Kim
K13.00006 Cooper pair spin current in SrRuO3 / Sr2RuO4 heterostructure, Presenter: Suk Bum Chung
L22.00007 Superfluid-inspired spintronics, Presenter: Pramey Upadhyaya
P22.00010 Novel perspectives for the control of antiferromagnetic solitons, Presenter: Ricardo Zarzuela
Y21.00014 Anisotropic Spin-Superfluid Magnet as a Long Josephson Junction, Presenter: Daniel Hill
L22.00004 (invited talk) Fast domain wall motion induced by antiferromagnetic spin dynamics at the angular momentum compensation temperature of ferrimagnets, Presenter: Kab-Jin Kim