79 citations · 539 across the 18 of their papers we have counts for
19 papers
Radiative electronic bound states in the continuum from defects in semiconductors
Seong Yun Hong, Liang Z. Tan, Ki Hoon Lee +2
Continuum-buried defect states in semiconductors are generally expected to be optically inactive due to their strong coupling to continuum bands. Here, we show that such defects ca…
Tetrahedral triple-Q magnetic ordering and large spontaneous Hall conductivity in the metallic triangular antiferromagnet Co1/3TaS2
Pyeongjae Park, Woonghee Cho, Chaebin Kim +14
The triangular lattice antiferromagnet (TLAF) has been the standard paradigm of frustrated magnetism for several decades. The most common magnetic ordering in insulating TLAFs is t…
Significant thermal Hall effect in the 3 cobalt Kitaev system
Heejun Yang, Chaebin Kim, Ysun Choi +9
Kitaev physics has recently attracted attention in condensed matter for its anticipated novel quantum spin liquid state. The thermal transport measurement is crucial for probing th…
Field-tunable toroidal moment and anomalous Hall effect in noncollinear antiferromagnetic Weyl semimetal Co1/3TaS2
Pyeongjae Park, Yoon-Gu Kang, Junghyun Kim +4
Combining magnetism with band topology provides various novel phases that are otherwise impossible. Among several cases, noncollinear metallic antiferromagnets can reveal particula…
Emergence of Topological Superconductivity in Doped Topological Dirac Semimetals under Symmetry-Lowering Lattice Distortions
Sangmo Cheon, Ki Hoon Lee, Suk Bum Chung +1
Recently, unconventional superconductivity having a zero-bias conductance peak is reported in doped topological Dirac semimetal (DSM) with lattice distortion. Motivated by the expe…
Spin texture induced by non-magnetic doping and spin dynamics in 2D triangular lattice antiferromagnet h-Y(Mn,Al)O3
Pyeongjae Park, Kisoo Park, Joosung Oh +14
Novel effects induced by nonmagnetic impurities in frustrated magnets and quantum spin liquid represent a highly nontrivial and interesting problem. A theoretical proposal of exten…
Kagome van-der-Waals Pd3P2S8 with flat band
Seunghyun Park, Soonmin Kang, Haeri Kim +13
With the advanced investigations into low-dimensional systems, it has become essential to find materials having interesting lattices that can be exfoliated down to monolayer. One p…
Spin-orbit coupling effects on spin-phonon coupling in Cd2Os2O7
Taehun Kim, Choong H. Kim, Jaehong Jeong +8
Spin-orbit coupling (SOC) is essential in understanding the properties of 5d transition metal compounds, whose SOC value is large and almost comparable to other key parameters. Ove…
Doping effects on the valence bond solid of LiRuO with Mn substitution
Seokhwan Yun, Ki Hoon Lee, Chaebin Kim +5
with a honeycomb structure undergoes a drastic transition from a regular honeycomb lattice with the space group to a valence bond solid state of the $P2_{1}/…
Momentum-dependent magnon lifetime in the metallic non-collinear triangular antiferromagnet CrB2
Pyeongjae Park, Kisoo Park, Taehun Kim +8
Non-collinear magnetic order arises for various reasons in several magnetic systems and exhibits interesting spin dynamics. Despite its ubiquitous presence, little is known of how…
Theory of two-dimensional nonlinear spectroscopy for the Kitaev spin liquid
Wonjune Choi, Ki Hoon Lee, Yong Baek Kim
Unambiguous identification of fractionalized excitations in quantum spin liquids has been a long-standing issue in correlated topological phases. Conventional spectroscopic probes,…
Magnetic and electrical anisotropy with correlation and orbital effects in dimerized honeycomb ruthenate LiRuO
Seokhwan Yun, Ki Hoon Lee, Se Young Park +6
Li2RuO3 undergoes a structural transition at a relatively high temperature of 550 K with a distinct dimerization of Ru-Ru bonds on the otherwise isotropic honeycomb lattice. It exh…
Magnetic Excitations in Non-Collinear Antiferromagnetic Weyl Semimetal
Pyeongjae Park, Joosung Oh, Klára Uhlířová +10
has recently attracted considerable attention as a magnetic Weyl semimetal exhibiting concomitant transport anomalies at room temperature. The topology of the e…
Magnon topology and thermal Hall effect in trimerized triangular lattice antiferromagnet
Kyung-Su Kim, Ki Hoon Lee, Suk Bum Chung +1
The non-trivial magnon band topology and its consequent responses have been extensively studied in two-dimensional magnetisms. However, the triangular lattice antiferromagnet (TLAF…
Cooper-Pair Spin Current in a Strontium Ruthenate Heterostructure
Suk Bum Chung, Se Kwon Kim, Ki Hoon Lee +1
It has been recognized that the condensation of spin-triplet Cooper pairs requires not only the broken gauge symmetry but also the spin ordering as well. One consequence of this is…
Topological magnon bands in the zigzag and stripy phases of antiferromagnetic honeycomb lattice
Ki Hoon Lee, Suk Bum Chung, Kisoo Park +1
We investigated the topological property of magnon bands in the collinear magnetic orders of zigzag and stripy phases for the antiferromagnetic honeycomb lattice and identified Ber…
Phase transitions of polariton condensate in 2D Dirac materials
Ki Hoon Lee, Changhee Lee, Hongki Min +1
For the quantum well in an optical microcavity, the interplay of the Coulomb interaction and the electron-photon (e-ph) coupling can lead to the hybridizations of the exciton and t…
Competing states for the fractional quantum Hall effect in the 1/3-filled second Landau level
Jae-Seung Jeong, Hantao Lu, Ki Hoon Lee +3
In this work, we investigate the nature of the fractional quantum Hall state in the 1/3-filled second Landau level (SLL) at filling factor (and 8/3 in the presence of the p…
On the origin of CE-type orbital fluctuations in the ferromagnetic metallic LaSrMnO
Dheeraj Kumar Singh, Ki Hoon Lee, Tetsuya Takimoto
We investigate the orbital fluctuations in the ferromagnetic-metallic phase of LaSrMnO by considering a two orbital model within a tight-binding description…