4 citations · 4 across the 7 of their papers we have counts for
7 papers
Deconfined Quantum Criticality at the Quantum Phase Transition from Antiferromagnetism to Algebraic Spin Liquid
Ki-Seok Kim
We investigate the quantum phase transition from antiferromagnetism () to algebraic spin liquid (). {\it We propose that spin 1/2 fermionic spinons in the fractional…
Quantum phase transition in one dimensional extended Kondo lattice model away from half filling
Ki-Seok Kim
We study one dimensional {\it extended} Kondo lattice model, described by the Hamiltonian for conduction electrons away from half filling and the Heisenberg Hamiltonian for l…
Role of non-magnetic disorder in a doped U(1) spin liquid
Ki-Seok Kim
Recently we investigated a role of non-magnetic disorder on the stability of a U(1) spin liquid () [cond-mat/0407151; Phys. Rev. B (R) accepted]. In the present paper we exam…
Role of doped holes in a U(1) spin liquid
Ki-Seok Kim
In the context of the SU(2) slave boson theory we show that condensation of holons can result in the zero mode of a nodal spinon in a single instanton potential. Instanton contribu…
Quantum phase transitions in superconductors
Ki-Seok Kim, Sung-Sik Lee, Jae-Hyeon Eom +1
Based on an effective Lagrangian obtained from the holon-pair boson theory of Lee and Salk [Phys. Rev. B {\bf 64}, 052501 (2001)] for high cuprates, we explore physical state…
Absence of time-reversal symmetry breaking in association with the order parameter of Cooper pair in high superconductivity
Sung-Sik Lee, Ki-Seok Kim, Jae-Hyun Eom +1
As an extension of our previous work on the holon pairing instability in the t-J Hamiltonian [Phys. Rev. B {\bf 66}, 054427 (2002)], we examine the orbital symmetries of holon pair…