48 citations · 114 across the 6 of their papers we have counts for
6 papers
Spin Hall effect in a Doped Mott Insulator
Su-Peng Kou, Xiao-Liang Qi, Zheng-Yu Weng
The existence of conserved spin Hall currents is shown in a strongly correlated system without involving spin-orbit coupling. The spin Hall conductivity is determined by intrinsic…
Mutual-Chern-Simons effective theory of doped antiferromagnets
Su-Peng Kou, Xiao-Liang Qi, Zheng-Yu Weng
A mutual-Chern-Simons Lagrangian is derived as a minimal field theory description of the phase-string model for doped antiferromagnets. Such an effective Lagrangian is shown to ret…
The road from one hole to the stripe phase
Fan Yang, Su-peng Kou
In this paper, it is shown how a single stripe and a stripe phase grow from individual holes in low doping regime. In an effective low-energy description of the t-J model, {\em i.e…
Self-localization of holes in a lightly doped Mott insulator
Su-Peng Kou, Z. Y. Weng
We show that lightly doped holes will be self-trapped in an antiferromagnetic spin background at low-temperatures, resulting in a spontaneous translational symmetry breaking. The u…
Holes as Dipoles in a Doped Antiferromagnet and Stripe Instabilities
Su-Peng Kou, Zheng-Yu Weng
Based on an effective model of a doped antiferromagnetic Mott insulator, we show that a doped hole will induce a dipole-like spin configuration in a spin ordered phase at low dopin…
Topological Gauge Structure and Phase Diagram for Weakly Doped Antiferromagnets
Su-Peng Kou, Zheng-Yu Weng
We show that the topological gauge structure in the phase string theory of the {\rm t-J} model gives rise to a global phase diagram of antiferromagnetic (AF) and superconducting (S…