321 citations · 2.4k across the 45 of their papers we have counts for
44 papers
Giant Magnetization Enhancement at Ultrathin Limit of an Orthoferrite
Jin Young Oh, Yaolong Xing, Seung Gyo Jeong +18
Low-dimensional magnetic systems have received significant interest due to their high scalability and energy efficiency for future electromagnetic applications. However, low-dimens…
Partial molecular orbitals in face-sharing 3 manganese trimer: Comparative studies on BaTaMnO and BaNbMnO
Anzar Ali, Heung-Sik Kim, Poonam Yadav +3
We present a molecular orbital candidate BaTaMnO with a face-sharing octahedra trimer, by comparing it with a related compound BaNbMnO. The sy…
Epitaxially strained ultrathin LaNiO/LaAlO and LaNiO/SrTiO superlattices: a density functional theory + study
Heung-Sik Kim, Sang Hyeon Park, Myung Joon Han
By employing first-principles electronic structure calculations we investigate nickelate superlattices [LaNiO]/[LaAlO] and [LaNiO]/[SrTiO] with (001…
Field-controlled quantum anomalous Hall effect in electron-doped CrSiTe monolayer: a first-principles prediction
Sungmo Kang, Seungjin Kang, Heung-Sik Kim +1
We report Chern insulating phases emerging from a single layer of layered chalcogenide CrSiTe, a transition metal trichacogenides (TMTC) material, in the presence of charge d…
Collective magnetic Higgs excitation in a pyrochlore ruthenate
Dirk Wulferding, Junkyeong Kim, Mi Kyung Kim +13
The emergence of scalar Higgs-type amplitude modes in systems where symmetry is spontaneously broken has been a highly successful, paradigmatic description of phase transitions, wi…
Active orbital degree of freedom and potential spin-orbit-entangled moments in Kitaev magnet candidate BaCo(AsO)
Subhasis Samanta, Panyalak Detrattanawichai, Sutassana Na-Phattalung +1
Candidate materials for Kitaev spin liquid phase have been intensively studied recently because of their potential applications in fault-tolerant quantum computing. Although most o…
Spin-orbit-entangled nature of magnetic moments and Kitaev magnetism in layered halides -RuX (X = Cl, Br, I)
Heung-Sik Kim
-RuCl has been extensively studied recently because of potential bond-dependent Kitaev magnetic exchange interactions and the resulting quantum spin liquid phase that can be…
Persistent half-metallic ferromagnetism in a (111)-oriented manganite superlattice
Fabrizio Cossu, Heung-Sik Kim, Biplab Sanyal +1
Heterostructures of mixed-valence manganites are still under intense scrutiny, due to the occurrence of exotic quantum phenomena linked to electronic correlation and interfacial co…
Spin-orbital entangled state and realization of Kitaev physics in 3d cobalt compounds: a progress report
Chaebin Kim, Heung-Sik Kim, Je-Geun Park
The realization of Kitaev's honeycomb magnetic model in real materials has become one of the most pursued topics in condensed matter physics and materials science. If found, it is…
Orbital-selective Mott phase and non-Fermi liquid in FePS
Minsung Kim, Heung-Sik Kim, Kristjan Haule +1
The layered metal phosphorous trisulfide FePS is reported to be a Mott insulator at ambient conditions and to undergo structural and insulator-metal phase transitions under pre…
Anomalous Hall signatures of nonsymmorphic nodal lines in doped chromium chalcospinel CuCrSe
Subhasis Samanta, Gang Chen, Heung-Sik Kim
An emerging phase of matter among the class of topological materials is nodal line semimetal, possessing symmetry-protected one-dimensional gapless lines at the (or close to) the F…
Lattice dynamics and structural transition of the hyperhoneycomb iridate -LiIrO investigated by high-pressure Raman scattering
Sungkyun Choi, Heung-Sik Kim, Hun-Ho Kim +8
We report a polarized Raman scattering study of the lattice dynamics of -LiIrO under hydrostatic pressures up to 7.62 GPa. At ambient pressure, -LiIrO exhibit…
Antiferromagnetic Kitaev interaction in $J_\rm{eff}=1/2$ cobalt honeycomb materials NaCoSbO and NaCoTeO
Chaebin Kim, Jaehong Jeong, Gaoting Lin +8
Finding new materials with antiferromagnetic (AFM) Kitaev interaction is an urgent issue to broaden and enrich the quantum magnetism research significantly. By carrying out inelast…
Spin-waves in 2D honeycomb lattice -type van der Waals antiferromagnet CoPS
Chaebin Kim, Jaehong Jeong, Takatsugu Masuda +5
The magnetic excitations in CoPS, a two-dimensional van der Waals (vdW) antiferromagnet with spin on a honeycomb lattice, has been measured using powder inelastic neutr…
Magnetic phase transitions and spin density distribution in the molecular multiferroic GaVS system
Rebecca L. Dally, William D. Ratcliff, Lunyong Zhang +7
We have carried out neutron diffraction and small angle neutron scattering measurements on a high quality single crystal of the cubic lacunar spinel multiferroic, GaVS, as…
Spin waves and spin-state transitions in a ruthenate high-temperature antiferromagnet
H. Suzuki, H. Gretarsson, H. Ishikawa +16
Ruthenium compounds play prominent roles in materials research ranging from oxide electronics to catalysis, and serve as a platform for fundamental concepts such as spin-triplet su…
Molecular Mott state in the deficient spinel GaVS
Heung-Sik Kim, Kristjan Haule, David Vanderbilt
In this study, we investigated theoretically the Mott-insulating phase of a deficient spinel chalcogenide GaVS, which is known to form a tetrahedral VS cluster unit…
Mott metal-insulator transitions in pressurized layered trichalcogenides
Heung-Sik Kim, David Vanderbilt, Kristjan Haule
Transition metal phosphorous trichalcogenides, ( and being transition metal and chalcogen elements respectively), have been the focus of substantial interest r…
Nearly triple nodal point topological phase in half-metallic GdN
Jinwoong Kim, Heung-Sik Kim, David Vanderbilt
Recent developments in topological semimetals open a way to realize relativistic dispersions in condensed matter systems. One recently studied type of topological feature is the "t…
Trimer Bonding States on the Surface of Transition-metal Dichalcogenide TaTe2
Chen Chen, Heung-Sik Kim, Alemayehu S. Admasu +4
We report a comprehensive study on the surface structural and electronic properties of TaTe2 at room temperature. The surface structure was investigated using both low energy elect…
Nodal-chain network, intersecting nodal rings and triple points coexisting in nonsymmorphic Ba3Si4
Jin Cai, Yuee Xie, Po-Yao Chang +2
Coexistence of topological elements in a topological metal/semimetal (TM) has gradually attracted attentions. However, the non-topological factors always mess up the Fermi surface…
Symmorphic intersecting nodal rings in semiconducting layers
Cheng Gong, Yuee Xie, Yuanping Chen +2
The unique properties of topological semimetals have strongly driven efforts to seek for new topological phases and related materials. Here, we identify a critical condition for th…
Realizing Haldane Model in Fe-based Honeycomb Ferromagnetic Insulators
Heung-Sik Kim, Hae-Young Kee
The topological Haldane model (THM) on a honeycomb lattice is a prototype of systems hosting topological phases of matter without external fields. It is the simplest model exhibiti…
Revealing frustrated local moment model for pressurized hyperhoneycomb iridate: paving a way toward quantum spin liquid
Heung-Sik Kim, Yong Baek Kim, Hae-Young Kee
There have been tremendous experimental and theoretical efforts toward discovery of quantum spin liquid phase in honeycomb-based-lattice materials with strong spin-orbit coupling.…