532 citations · 1.4k across the 33 of their papers we have counts for
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Quantum Scalar Spin Chirality in Coplanar Kagome Antiferromagnets
Nanse Esaki, Gyungchoon Go, Se Kwon Kim
We theoretically demonstrate that quantum fluctuations inherent to antiferromagnets can generate scalar spin chirality at zero temperature even in coplanar ordered magnets. In a ka…
Helicity-Selective Phonon Absorption and Phonon-Induced Spin Torque from Interfacial Spin-Lattice Coupling
Gyungchoon Go, Se Kwon Kim
In magnetic heterostructures with broken inversion symmetry, the Rashba effect gives rise to a gradient-free interaction between magnons and phonons, which we term interfacial spin…
Kineo-Elasticity and Nonreciprocal Phonons by Rashba-induced Interfacial Spin-Lattice Coupling
Gyungchoon Go, Se Kwon Kim
We identify a previously unrecognized spin-lattice coupling that is allowed in the presence of broken inversion symmetry that can be considered as a lattice analogue to the electro…
Magnetoelastic Coupling-Driven Chiral Spin Textures: A Skyrmion-Antiskyrmion-Like Array
Gyungchoon Go, Se Kwon Kim
We theoretically demonstrate that sufficiently strong magnetoelastic coupling can change the ground state of otherwise uniform spin systems to chiral spin configurations. More spec…
Magnon-induced scalar spin chirality in Kagome and honeycomb ferromagnets
Nanse Esaki, Gyungchoon Go, Se Kwon Kim
The scalar spin chirality (SSC), defined as a triple product of spins, is essential for describing noncoplanar spin structures and understanding chiral physics in magnetic systems.…
Scalar Spin Chirality Hall Effect
Gyungchoon Go, Durga Prasad Goli, Nanse Esaki +2
The scalar spin chirality, which characterizes the fundamental unit of noncoplanar spin structures, plays an important role in rich chiral physics of magnetic materials. In particu…
Topological magnon-polarons in honeycomb antiferromagnets with spin-flop transition
Gyungchoon Go, Heejun Yang, Je-Geun Park +1
We theoretically investigate the thermal Hall transport of magnon-polarons in a two-dimensional honeycomb antiferromagnetic insulator under the influence of a perpendicular magneti…
Emergence of stable meron quartets in twisted magnets
Kyoung-Min Kim, Gyungchoon Go, Moon Jip Park +1
The investigation of twist engineering in easy-axis magnetic systems has revealed the remarkable potential for generating topological spin textures, such as magnetic skyrmions. Her…
Intrinsic Magnon Orbital Hall Effect in Honeycomb Antiferromagnets
Gyungchoon Go, Daehyeon An, Hyun-Woo Lee +1
We theoretically investigate the transport of magnon orbitals in a honeycomb antiferromagnet. We find that the magnon orbital Berry curvature is finite even without spin-orbit coup…
Electronic Manipulation of Magnon Topology by Chirality Injection from Boundaries
Seunghun Lee, Gyungchoon Go, Se Kwon Kim
Magnon bands are known to exhibit nontrivial topology in ordered magnets under suitable conditions, engendering topological phases referred to as magnonic topological insulators. C…
Tunable large spin Nernst effect in a two-dimensional magnetic bilayer
Gyungchoon Go, Se Kwon Kim
We theoretically investigate topological spin transport of the magnon-polarons in bilayer magnet with two-dimensional square lattices. Our theory is motivated by recent reports on…
Generation of Nonreciprocity of Gapless Spin Waves by Chirality Injection
Gyungchoon Go, Seunghun Lee, Se Kwon Kim
In chiral magnets with intrinsic inversion symmetry breaking, it has been known that two spin waves moving in opposite directions can propagate at different velocities, exhibiting…
Role of orbital hybridization in anisotropic magnetoresistance
Hye-Won Ko, Hyeon-Jong Park, Gyungchoon Go +3
We theoretically and numerically show that longitudinal orbital currents in ferromagnets depend on the magnetization direction, which contribute to the anisotropic magnetoresistanc…
Numerical Computation of Spin-Transfer Torques for Antiferromagnetic Domain walls
Hyeon-Jong Park, Yunboo Jeong, Se-Hyeok Oh +5
We numerically compute current-induced spin-transfer torques for antiferromagnetic domain walls, based on a linear response theory in a tight-binding model. We find that, unlike fo…
Topological waveguide based on metamaterials of magnetic solitons
Gyungchoon Go, Ik-Sun Hong, Seo-Won Lee +2
We theoretically investigate coupled gyration modes of magnetic solitons whose distances to the nearest neighbors are staggered. In a one-dimensional bipartite lattice, analogous t…
SU(3) Topology of Magnon-Phonon Hybridization in 2D Antiferromagnets
Shu Zhang, Gyungchoon Go, Kyung-Jin Lee +1
Magnon-phonon hybrid excitations are studied theoretically in a two-dimensional antiferromagnet with an easy axis normal to the plane. We show that two magnon bands and one phonon…
Unidirectional Magnon-Driven Domain Wall Motion Due to the Interfacial Dzyaloshinskii-Moriya Interaction
Kyoung-Whan Kim, Seo-Won Lee, Jung-Hwan Moon +5
We demonstrate a unidirectional motion of a quasiparticle without an explicit symmetry breaking along the space-time coordinate of the particle motion. This counterintuitive behavi…