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5 papers · 2 filters
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…
Thermal conductivity in the doped two-leg ladder antiferromagnet SrCaCuO
Jihong Qin, Shiping Feng, Feng Yuan +1
Within the t-J model, the heat transport of the doped two-leg ladder material SrCaCuO is studied in the doped regime where superconductivity appears un…
Doping dependence of charge dynamics in electron-doped cuprates
Tianxing Ma, Huaiming Guo, Shiping Feng
Within the t-t'-J model, the doping dependence of charge dynamics in electron-doped cuprates is studied. The conductivity spectrum shows a pseudogap structure with a low-energy pea…
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…