375 citations · 2k across the 34 of their papers we have counts for
32 papers
Gauge-Field-Mediated Symmetry Breaking of Matters Under Electromagnetic Fields and Its Impact on Spin Dynamics
Uiseok Jeong, Esmaeil Taghizadeh Sisakht, Angel Rubio +3
When a condensed-matter system is subjected to external electromagnetic fields, the gauge-invariant formulation of physical operators must explicitly incorporate the gauge-field co…
Optoelectronic manifestation of orbital angular momentum driven by chiral hopping in helical Se chains
Bumseop Kim, Dongbin Shin, Seon Namgung +3
Chiral materials have garnered significant attention in the field of condensed matter physics. Nevertheless, the magnetic moment induced by the chiral spatial motion of electrons i…
Microscopic study of orbital textures
Seungyun Han, Hyun-Woo Lee, Kyoung-Whan Kim
Many interesting spin and orbital transport phenomena originate from orbital textures, referring to -dependent orbital states. Most of previous works are based on symmetry…
Orbital Dynamics in Centrosymmetric Systems
Seungyun Han, Hyun-Woo Lee, Kyoung-Whan Kim
Orbital dynamics in time-reversal-symmetric centrosymmetric systems is examined theoretically. Contrary to common belief, we demonstrate that many aspects of orbital dynamics are q…
Vertical transverse transport induced by hidden in-plane Berry curvature in two dimensions
Kyoung-Whan Kim, Hogyun Jeong, Jeongwoo Kim +1
The discovery of Berry curvature (BC) has spurred a tremendous surge of research into various quantum phenomena such as the anomalous transport of electrons and the topological pha…
Long-Range Orbital Magnetoelectric Torque in Ferromagnets
Dongwook Go, Daegeun Jo, Kyoung-Whan Kim +6
While it is often assumed that the orbital response is suppressed and short-ranged due to strong crystal field potential and orbital quenching, we show that the orbital magnetoelec…
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…
Elusive Dzyaloshinskii-Moriya interaction in FeGeTe monolayer
Slimane Laref, Kyoung-Whan Kim, Aurelien Manchon
Using symmetry analysis and density functional theory calculations, we uncover the nature of Dzyaloshinskii-Moriya interaction in FeGeTe monolayer. We show that while such…
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…
Stability and dynamics of in-plane skyrmions in collinear ferromagnets
Ricardo Zarzuela, Venkata Krishna Bharadwaj, Kyoung-Whan Kim +2
We study the emergence and dynamics of in-plane skyrmions in collinear ferromagnetic heterostructures. We present a minimal energy model for this class of magnetic textures, determ…
Prediction of ferroelectricity-driven Berry curvature enabling charge- and spin-controllable photocurrent in tin telluride monolayers
Jeongwoo Kim, Kyoung-Whan Kim, Dongbin Shin +4
In symmetry-broken crystalline solids, pole structures of Berry curvature (BC) can emerge, and they have been utilized as a versatile tool for controlling transport properties. For…
Intrinsic origin of interfacial second-order magnetic anisotropy in ferromagnet/normal metal heterostructures
Hyung Keun Gweon, Hyeon-Jong Park, Kyoung-Whan Kim +2
Interfacial perpendicular magnetic anisotropy, which is characterized by the first-order (K1) and second-order (K2) anisotropies, is the core phenomenon for nonvolatile magnetic de…
Topological characterization of classical waves: the topological origin of magnetostatic surface spin waves
Kei Yamamoto, Guo Chuan Thiang, Philipp Pirro +3
We propose a topological characterization of Hamiltonians describing classical waves. Applying it to the magnetostatic surface spin waves that are important in spintronics applicat…
Spin transparency for an interface of an ultrathin magnet within the spin dephasing length
Kyoung-Whan Kim
We examine a modified drift-diffusion formalism to describe spin transport near an ultrathin magnet whose thickness is similar to or less than the spin dephasing length. Most of th…
Chiral magnetic interlayer coupling in synthetic antiferromagnets
Dong-Soo Han, Kyujoon Lee, Jan-Philipp Hanke +9
The exchange coupling underlies ferroic magnetic coupling and is thus the key element that governs statics and dynamics of magnetic systems. This fundamental interaction comes in t…
Enhanced perpendicular magnetocrystalline anisotropy energy in an artificial magnetic material with bulk spin-momentum coupling
Abdul-Muizz Pradipto, Kay Yakushiji, Woo Seung Ham +8
We systematically investigate the perpendicular magnetocrystalline anisotropy (MCA) in CoPt/Pd-based multilayers. Our magnetic measurement data shows that the asymmetric Co/Pd/P…
Roles of chiral renormalization on magnetization dynamics in chiral magnets
Kyoung-Whan Kim, Hyun-Woo Lee, Kyung-Jin Lee +3
In metallic ferromagnets, the interaction between local magnetic moments and conduction electrons renormalizes parameters of the Landau-Lifshitz-Gilbert equation such as the gyroma…
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…
Asymmetric skyrmion Hall effect in systems with a hybrid Dzyaloshinskii-Moriya interaction
Kyoung-Whan Kim, Kyoung-Woong Moon, Nico Kerber +2
We examine the current-induced dynamics of a skyrmion that is subject to both structural and bulk inversion asymmetry. There arises a hybrid type of Dzyaloshinskii-Moriya interacti…
Spin-orbit torques from interfacial spin-orbit coupling for various interfaces
Kyoung-Whan Kim, Kyung-Jin Lee, Jairo Sinova +2
We use a perturbative approach to study the effects of interfacial spin-orbit coupling in magnetic multilayers by treating the two-dimensional Rashba model in a fully three-dimensi…
Chiral magnetoresistance in Pt/Co/Pt zigzag wires
Yuxiang Yin, Dong-Soo Han, June-Seo Kim +7
The Rashba effect leads to a chiral precession of the spins of moving electrons while the Dzyaloshinskii-Moriya interaction (DMI) generates preference towards a chiral profile of l…
Theory of Kondo suppression of spin polarization in nonlocal spin valves
Kyoung-Whan Kim, Liam O'Brien, Paul A. Crowell +2
We theoretically analyze contributions from the Kondo effect to the spin polarization and spin diffusion length in all-metal nonlocal spin valves. Interdiffusion of ferromagnetic a…
Perpendicular magnetic anisotropy of two-dimensional Rashba ferromagnets
Kyoung-Whan Kim, Kyung-Jin Lee, Hyun-Woo Lee +1
We compute the magnetocrystalline anisotropy energy within two-dimensional Rashba models. For a ferromagnetic free-electron Rashba model, the magnetic anisotropy is exactly zero re…
Intrinsic Spin Torque Without Spin-Orbit Coupling
Kyoung-Whan Kim, Kyung-Jin Lee, Hyun-Woo Lee +1
We derive an intrinsic contribution to the non-adiabatic spin torque for non-uniform magnetic textures. It differs from previously considered contributions in several ways and can…