4 papers · 1 filter
Spin-charge separation: From one hole to finite doping
Z. Y. Weng, D. N. Sheng, C. S. Ting
In the presence of nonlocal phase shift effects, a quasiparticle can remain topologically stable even in a spin-charge separation state due to the confinement effect introduced by…
Isotropic dispersion, line shape, and remnant Fermi surface in one hole problem
Z. Y. Weng, D. N. Sheng, C. S. Ting
It is shown that the isotropic dispersion relation, line shape of the spectral function, and remnant Fermi surface found in recent photoemission experiment in insulating Ca_2CuO_2C…
Modified Double Exchange Model with Novel Spin and Orbital Coupling: Phase Diagram of The Manganites
L. Sheng, C. S. Ting
From a general model of the Mn oxides R_{1-x}A_{x}MnO_3, we derive an effective Hamiltonian in the low-energy subspace using the projection operator method, in which a novel coupli…
A bosonic RVB description of doped antiferromagnet
Z. Y. Weng, D. N. Sheng, C. S. Ting
We propose a theory for doped antiferromagnet based on a bosonic resonating-valence-bond (RVB) state with incorporating the phase string effect. Both antiferromagnetic (AF) and sup…