70 citations · 338 across the 15 of their papers we have counts for
15 papers
Bond-dependent anisotropy and magnon decay in cobalt-based Kitaev triangular antiferromagnet
Chaebin Kim, Sujin Kim, Pyeongjae Park +9
The Kitaev model, a honeycomb network of spins with bond-dependent anisotropic interactions, is a rare example of having a quantum spin liquid ground state. Although most Kitaev mo…
PBH formation from overdensities in delayed vacuum transitions
Kiyoharu Kawana, TaeHun Kim, Philip Lu
Primordial black hole (PBH) formation from first-order phase transitions (FOPTs) combines two prevalent elements of beyond the Standard Model physics with wide-ranging consequences…
Slow oxidation of magnetite nanoparticles elucidates the limits of the Verwey transition
Taehun Kim, Sangwoo Sim, Sumin Lim +8
Magnetite (Fe3O4) is of fundamental importance as the original magnetic material and also for the Verwey transition near T_V = 125 K, below which a complex lattice distortion and e…
Hubble selection of the weak scale from QCD quantum critical point
Sunghoon Jung, TaeHun Kim
There is growing evidence that the small weak scale may be related to self-organized criticality. In this regard, we note that if the strange quark were lighter, the QCD phase tran…
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…
Pressure-induced transition from Jeff=1/2 to S=1/2 states in CuAl2O4
Hwanbeom Cho, Choong H. Kim, Yongmoon Lee +12
The spin-orbit entangled (SOE) Jeff-state has been a fertile ground to study novel quantum phenomena. Contrary to the conventional weakly correlated Jeff=1/2 state of 4d and 5d tra…
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…
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…
Constraining the gravitational coupling of axion dark matter at LIGO
Sunghoon Jung, TaeHun Kim, Jiro Soda +1
The axion-gravity Chern-Simons coupling is well motivated but is relatively weakly constrained, partly due to difficult measurements of gravity. We study the sensitivity of LIGO me…
GRB lensing parallax: Closing primordial black hole dark matter mass window
Sunghoon Jung, TaeHun Kim
The primordial black hole (PBH) comprising full dark matter (DM) abundance is currently allowed if its mass lies between .…
Probing Cosmic Strings with Gravitational-Wave Fringe
Sunghoon Jung, TaeHun Kim
Cosmic strings are important remnants of early-Universe phase transitions. We show that they can be probed by Gravitational Waves (GWs) from compact binary mergers. If such chirpin…
Hybridization and Decay of Magnetic Excitations in two-dimensional Triangular Lattice Antiferromagnets
Taehun Kim, Kisoo Park, Jonathan C. Leiner +1
Elementary quasiparticles in solids such as phonons and magnons occasionally have nontrivial interactions between them, as well as among themselves. As a result, their energy eigen…
Renormalization of spin excitations in hexagonal HoMnO3 by magnon-phonon coupling
Taehun Kim, Jonathan C. Leiner, Kisoo Park +5
Hexagonal HoMnO3, a two-dimensional Heisenberg antiferromagnet, has been studied via inelastic neutron scattering. A simple Heisenberg model with a single-ion anisotropy describes…
Magnetic excitations in bulk multiferroic two-dimensional triangular lattice antiferromagnet (Lu,Sc)FeO
J. C. Leiner, Taehun Kim, Kisoo Park +7
Non-collinear two-dimensional triangular lattice antiferromagnets (2D TLAF) are currently an area of very active research due to their unique magnetic properties, which lead to non…
Giant thermal hysteresis in Verwey transition of single domain Fe3O4 nanoparticles
Taehun Kim, Sumin Lim, Jaeyoung Hong +12
Most interesting phenomena of condensed matter physics originate from interactions among different degrees of freedom, making it a very intriguing yet challenging question how cert…