20 citations · 78 across the 22 of their papers we have counts for
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Heavy-fermion spin liquid in the strong hybridization limit of the finite-U Anderson lattice model
Ki-Seok Kim
Studying the finite-U Anderson lattice model in the strong hybridization limit, we find a heavy-fermion spin liquid phase, where both conduction and localized fermions are strongly…
How to control pairing fluctuations: SU(2) slave-rotor gauge theory of the Hubbard model
Ki-Seok Kim
We study how to incorporate Mott physics in the BCS-type superconductor, motivated from the fact that high superconductivity results from a Mott insulator via hole doping. Th…
Antiferromagnetic metal to heavy-fermion metal quantum phase transition in the Kondo lattice model: A strong coupling approach
Ki-Seok Kim, Mun Dae Kim
We study the quantum phase transition from an antiferromagnetic metal to a heavy fermion metal in the Kondo lattice model. Based on the strong coupling approach we {\it first} diag…
Slave rotor theory of antiferromagnetic Hubbard model
Ki-Seok Kim, Jung Hoon Han
The slave-rotor mean-field theory of Florens and Georges is generalized to the antiferromagnetic phase of the Hubbard model. An effective action consisting of a spin rotor and a fe…
SU(2) gauge theory of the Hubbard model: Emergence of an anomalous metallic phase near the Mott critical point
Ki-Seok Kim
We propose one possible mechanism for an anomalous metallic phase appearing frequently in two spatial dimensions, that is, local pairing fluctuations. Introducing a pair-rotor repr…
Role of disorder in the Mott-Hubbard transition
Ki-Seok Kim
We investigate the role of disorder in the Mott-Hubbard transition based on the slave-rotor representation of the Hubbard model, where an electron is decomposed into a fermionic sp…