617 citations · 1.8k across the 37 of their papers we have counts for
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Tunable electronic and magnetic phases in layered ruthenates: SrRuO3-SrTiO3 heterostructure upon strain
Minjae Kim, Chang-Jong Kang, Jae-Ho Han +2
Layered ruthenates are a unique class of systems which manifests a variety of electronic and magnetic features emerged from competing energy scales. At the heart of such features l…
Global perspectives of the bulk electronic structure of URuSi from angle-resolved photoemission
J. D. Denlinger, J. -S. Kang, L. Dudy +7
Previous high-resolution angle-resolved photoemission (ARPES) studies of URuSi have characterized the temperature-dependent behavior of narrow-band states close to the Ferm…
Multiple topological Dirac cones in a mixed-valent Kondo semimetal: g-SmS
Chang-Jong Kang, Dong-Choon Ryu, Junwon Kim +5
We demonstrate theoretically that the golden phase of SmS (-SmS), a correlated mixed-valent system, exhibits nontrivial surface states with diverse topology. It turns out that t…
Topological Phase Transition in an Archetypal f-electron Correlated System: Ce
Junwon Kim, Dongchoon Ryu, Chang-Jong Kang +4
A typical f-electron Kondo lattice system Ce exhibits the well-known isostructural transition, the so-called gamma-alpha transition, accompanied by an enormous volume collapse. Mos…
Emergence of Kondo resonance in graphene intercalated with cerium
Jinwoong Hwang, Kyoo Kim, Hyejin Ryu +11
The interaction between a magnetic impurity, such as cerium (Ce) atom, and surrounding electrons has been one of the core problems in understanding many-body interaction in solid a…
Honeycomb Charge Ordering in IrTe
Hyo Sung Kim, Soo-Ran Kim, Kyoo Kim +4
We report on the observation of a unique honeycomb charge ordering of the cleaved IrTe surface by high-resolution scanning tunneling microscopy (STM) and spectroscopy (STS). Ir…
Topological properties and the dynamical crossover from mixed-valence to Kondo-lattice behavior in golden phase of SmS
Chang-Jong Kang, Hong Chul Choi, Kyoo Kim +1
We have investigated temperature-dependent behaviors of electronic structure and resistivity in a mixed-valent golden phase of SmS, based on the dynamical mean-field theory band st…
Dimerization-Induced Fermi-Surface Reconstruction in IrTe2
Man Jin Eom, Kyoo Kim, Y. J. Jo +6
We report a de Haas-van Alphen (dHvA) oscillation study on IrTe2 single crystals showing complex dimer formations. By comparing the angle dependence of dHvA oscillations with band…
Termination-dependent Surface In-gap States in a Mixed-valent Topological Insulator: SmB
Junwon Kim, Kyoo Kim, Chang-Jong Kang +5
We have investigated the surface states of a potential mixed-valent topological insulator SmB based on the first principles density functional theory slab band structure analys…
Universal metastability of the low-spin state in Co systems: non-Mott type pressure-induced spin-state transition in CoCl
Bongjae Kim, Kyoo Kim, B. I. Min
We have investigated the pressure-induced spin-state transition in Co systems in terms of a competition between the Hund's exchange energy () and the crystal-field splitt…
Structural instability and the Mott-Peierls transition in a half-metallic hollandite : KCrO
Sooran Kim, Kyoo Kim, B. I. Min
In order to explore the driving mechanism of the concomitant metal-insulator and structural transitions in quasi-one-dimensional hollandite KCrO, electronic stru…
Band symmetries of mixed-valence topological insulator: SmB6
Chang-Jong Kang, Junwon Kim, Kyoo Kim +3
We have investigated the band structure and the band symmetry of mixed-valence insulator SmB systematically within the density functional theory (DFT). We have analyzed the s…
Quantum Oscillations of the Metallic Triangular-lattice Antiferromagnet PdCrO2
Jong Mok Ok, Y. J. Jo, K. Kim +6
We report the de Haas-van Alphen (dHvA) oscillations and first-principle calculations for triangular antiferromagnet PdCrO2 showing unconventional anomalous Hall effect (AHE). The…
Correlation Assisted Phonon Softenings and the Mott-Peierls Transition in VO
Sooran Kim, Kyoo Kim, Chang-Jong Kang +1
To explore the driving mechanisms of the metal-insulator transition (MIT) and the structural transition in VO2, we have investigated phonon dispersions of rutile VO2 (R-VO2) in the…
Fermi Surface Reconstruction in CeTe2 Induced by Charge Density Wave: ARPES Study
J. -S. Kang, D. H. Kim, H. J. Lee +10
Electronic structures of a charge-density-wave CDW system CeTe_2-xSb_x (x=0, 0.05) have been investigated by employing angle-resolved photoemission spectroscopy (ARPES). The observ…
Incommensurate Magnetism in FeAs Strips: Neutron Scattering from CaFeAs
Yusuke Nambu, Liang L. Zhao, Emilia Morosan +7
Magnetism in the orthorhombic metal CaFeAs was examined through neutron diffraction for powder and single crystalline samples. Incommensurate (${\bm q}_{\rm m}\approx (0.37…
Effects of strain on the electronic structure of VO_2
Bence Lazarovits, Kyoo Kim, Kristjan Haule +1
We present cluster-DMFT (CTQMC) calculations based on a downfolded tight-binding model in order to study the electronic structure of vanadium dioxide (VO_2) both in the low-tempera…
Dynamical Mean-Field Theory within the Full-Potential Methods: Electronic structure of Ce-115 materials
Kristjan Haule, Chuck-Hou Yee, Kyoo Kim
We implemented the charge self-consistent combination of Density Functional Theory and Dynamical Mean Field Theory (DMFT) in two full-potential methods, the Augmented Plane Wave an…
Thermoelectric Power in the Double Exchange Model
Beom Hyun Kim, Unjong Yu, Kyoo Kim +1
Employing the Monte-Carlo method and the exact diagonalization, we have investigated the temperature dependence of the thermoelectric power (TEP) for the double exchange model in t…