129 citations · 343 across the 11 of their papers we have counts for
11 papers
Studies on Novel Yb-based Candidate Triangular Quantum Antiferromagnets: Ba3YbB3O9 and Ba3YbB9O18
Hwanbeom Cho, Stephen J. Blundell, Toni Shiroka +3
Yb-based triangular magnets have recently attracted attention as promising candidates to explore frustrated quantum magnetism. However, some candidates have turned out to have sign…
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…
Dynamic Spin Fluctuations in the Frustrated A-site Spinel CuAl2O4
Hwanbeom Cho, R. Nirmala, Jaehong Jeong +7
We performed nuclear magnetic resonance (NMR) and muon spin relaxation (μSR) experiments to identify the magnetic ground state of the frustrated quantum A-site spinel, CuAl2O4. Our…
Bulk properties of van-der-Waals hard ferromagnet VI3
Suhan Son, Matthew J. Coak, Nahyun Lee +12
We present comprehensive measurements of the structural, magnetic and electronic properties of layered van-der-Waals ferromagnet VI down to low temperatures. Despite belonging…
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…
Theoretical evidence of spin-orbital-entangled =1/2 state in the 3 transition metal oxide CuAlO
Choong H. Kim, Hwanbeom Cho, Santu Baidya +6
Transition metal oxides exhibit various competing phases and exotic phenomena depending on how their reaction to the rich degeneracy of the -orbital. Large spin-orbit coupling (…
Structural investigation of the insulator-metal transition in NiSSe compounds
Garam Han, Sungkyun Choi, Hwanbeom Cho +3
We report on a combined measurement of high-resolution x-ray diffraction on powder and Raman scattering on single crystalline NiS2-xSex samples that exhibit the insulator-metal tra…
Unconventional anomalous Hall effect from antiferromagnetic domain walls of Nd2Ir2O7 thin films
Woo Jin Kim, John H. Gruenewald, Taekoo Oh +11
Ferroic domain walls (DWs) create different symmetries and ordered states compared with those in single-domain bulk materials. In particular, the DWs of an antiferromagnet (AFM) wi…
Frustrated antiferromagnetic honeycomb-tunnel-like lattice CuRE2Ge2O8 (RE=Pr, Nd, Sm, and Eu)
Hwanbeom Cho, Marie Kratochvilova, Nahyun Lee +2
New frustrated antiferromagnetic compounds CuRE2Ge2O8 (RE=Pr, Nd, Sm, Eu) have been investigated using high-resolution x-ray diffraction, magnetic and heat capacity measurements. T…
Properties of spin 1/2 triangular lattice antiferromagnets: CuRE2Ge2O8 (RE=Y, La)
Hwanbeom Cho, Marie Kratochvilova, Hasung Sim +10
We found new two-dimensional (2D) quantum (S=1/2) antiferromagnetic systems: CuRE2Ge2O8 (RE=Y and La). According to our analysis of high-resolution X-ray and neutron diffraction ex…
Spin glass behavior in frustrated quantum spin system CuAl2O4 with a possible orbital liquid state
R. Nirmala, Kwang-Hyun Jang, Hasung Sim +10
CuAl2O4 is a normal spinel oxide having quantum spin, S=1/2 for Cu2+. It is a rather unique feature that the Cu2+ ions of CuAl2O4 sit at a tetrahedral position, not like the usual…