187 citations · 357 across the 7 of their papers we have counts for
7 papers
Ordering and criticality in an underscreened Kondo chain
Wing-Ho Ko, Hong-Chen Jiang, Jeffrey G. Rau +1
Motivated by the nickel valence controversy in the perovskite nickelate RNiO_3, we consider a one-dimensional underscreened Kondo chain consisting of alternating spin-1 ("nickel")…
Proposal for detecting spin-chirality terms in Mott insulators via resonant inelastic x-ray scattering
Wing-Ho Ko, Patrick A. Lee
We consider the question of whether resonant inelastic x-ray scattering (RIXS) can be used to detect many-body excitations that are coupled to the spin-chirality terms S_i . (S_j x…
Magnetism and Mott Transition: A Slave-rotor Study
Wing-Ho Ko, Patrick A. Lee
Motivated by the debate of spin-density-wave (SDW) versus local-moment (LM) picture in the iron-based superconducting (FeSC) materials, we consider a two-band orbital-symmetric Hub…
Raman signature of the U(1) Dirac spin-liquid state in spin-1/2 kagome system
Wing-Ho Ko, Zheng-Xin Liu, Tai-Kai Ng +1
We followed the Shastry--Shraiman formulation of Raman scattering in Hubbard systems and considered the Raman intensity profile in the spin-1/2 "perfect" kagome lattice herbertsmit…
Doped Kagome System as Exotic Superconductor
Wing-Ho Ko, Patrick A. Lee, Xiao-Gang Wen
A Chern--Simons theory for the doped spin-1/2 kagomé system is constructed, from which it is shown that the system is an exotic superconductor that breaks time-reversal symmetry. I…
Spontaneous spin ordering of Dirac spin liquid in a magnetic field
Ying Ran, Wing-Ho Ko, Patrick A. Lee +1
The Dirac spin liquid was proposed to be the ground state of the spin-1/2 Kagome antiferromagnets. In a magnetic field , we show that the state with Fermi pocket is unstable to…