114 citations · 896 across the 29 of their papers we have counts for
18 papers · 1 filter
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…
Edwards polaron formation : From one to three dimension
M. Chakraborty, N. Mohanta, A. Taraphder +2
Employing a self-consistent (optimized) variational diagonalization scheme, we investigate the formation of polaronic quasiparticles in a spinless fermion-boson transport model tha…
The Insulating Nature of Na2IrO3: Mott-type or Slater-type?
Minjae Kim, Beom Hyun Kim, B. I. Min
We have investigated temperature-dependent electronic structures of Na2IrO3 to unravel its insulating nature. Employing the combined scheme of the density-functional theory (DFT) 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…
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…
Temperature Dependence of Linked Gap and Surface State Evolution in the Mixed Valent Topological Insulator SmB6
J. D. Denlinger, J. W. Allen, J. -S. Kang +6
Taken together and viewed holistically, recent theory, low temperature (T) transport, photoelectron spectroscopy and quantum oscillation experiments have built a very strong case t…
SmB6 Photoemission: Past and Present
Jonathan D. Denlinger, James W. Allen, Jeong-Soo Kang +4
Recent renewed interest in the mixed valent insulator SmB6 comes from topological theory predictions and surface transport measurements of possible in-gap surface states whose exis…
Electronic excitations in the edge-shared relativistic Mott insulator: NaIrO
Beom Hyun Kim, G. Khaliullin, B. I. Min
We have investigated the excitation spectra of = Mott insulator NaIrO. Taking into account a relativistic multiplet structure of Ir ions, we have calc…
Interacting Holstein and extended-Holstein bipolarons
Monodeep Chakraborty, Masaki Tezuka, B. I. Min
Employing the recently developed self-consistent variational basis generation scheme, we have investigated the bipolaron-bipolaron interaction within the purview of Holstein-Hubbar…
A new self-consistent basis generation scheme for polaron and bipolaron systems
Monodeep Chakraborty, B. I. Min
We have developed a new self-consistent scheme of generating variational basis based on the exactdiagonalization, which can be applied efficiently to various types of electron-phon…
Kink during the formation of the Kondo resonance band in the heavy fermion system
Hong Chul Choi, K. Haule, G. Kotliar +2
We have investigated the formation of the Kondo resonance (KR) band and the hybridization gap (HG) in the heavy fermion compound CeCoGe2, using a combined approach of the density f…
Magnetic couplings, optical spectra, and spin-orbit exciton in 5d electron Mott insulator Sr2IrO4
Beom Hyun Kim, G. Khaliullin, B. I. Min
Based on the microscopic model including strong spin-orbit coupling, on-site Coulomb and Hund's interactions, as well as crystal field effects, we have investigated magnetic and op…
Temperature-dependent Fermi surface evolution in heavy fermion CeIrIn5
Hong Chul Choi, B. I. Min, J. H. Shim +2
In Cerium-based heavy electron materials, the 4f electron's magnetic moments bind to the itinerant quasiparticles to form composite heavy quasiparticles at low temperature. The vol…
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…
Photoemission and x-ray absorption spectroscopy study of electron-doped colossal magnetoresistance manganite: La0.7Ce0.3MnO3 film
S. W. Han, J. -S. Kang, K. H. Kim +11
The electronic structure of La0.7Ce0.3MnO3 (LCeMO) thin film has been investigated using photoemission spectroscopy (PES) and x-ray absorption spectroscopy (XAS). The Ce 3d core-le…
Unquenched large orbital magnetic moment in NiO
S. K. Kwon, B. I. Min
Magnetic properties of NiO are investigated by incorporating the spin-orbit interaction in the LSDA+U scheme. It is found that the large part of orbital moment remains unquenched i…
Origin of the giant magnetic moments of Fe impurities on and in Cs films
S. K. Kwon, B. I. Min
To explore the origin of the observed giant magnetic moments () of Fe impurities on the surface and in the bulk of Cs films, we have performed the relativistic LSDA + U…
The small polaron crossover transition in colossal magnetoresistance (CMR) manganites
Unjong Yu, B. I. Min
Based on the combined model of the double exchange and the polaron, we have studied the small-to-large polaron crossover transition and explored its effects on the magnetic and tra…