8 papers
Non-Fermi liquid behavior in an extended Anderson model
Yu-Liang Liu, Zhao-Bin Su, Lu Yu
An extended Anderson model, including screening channels (non-hybridizing, but interacting with the local orbit), is studied within the Anderson-Yuval approach, originally devised…
Universality class of non-Fermi liquid behavior in mixed valence systems
Guang-Ming Zhang, Zhao-Bin Su, Lu Yu
A generalized Anderson single-impurity model with off-site Coulomb interactions is derived from the extended three-band Hubbard model, originally proposed to describe the physics o…
Theory of the Normal State of Cuprate Superconducting Materials
Yu-Liang Liu
We have proposed a model Hamiltonian, which describes a simple physical picture that the holes with single occupation constraint introduced by doping move in the antiferromagnetic…
Impurity Energy Level Within The Haldane Gap
Wei Wang, Shaojin Qin, Zhong-Yi Lu +2
An impurity bond in a periodic 1D antiferromagnetic, spin 1 chain with exchange is considered. Using the numerical density matrix renormalization group method, we find a…
Edge states in Open Antiferromagnetic Heisenberg Chains
Shaojin Qin, Tai-Kai Ng, Zhao-Bin Su
In this letter we report our results in investigating edge effects of open antiferromagnetic Heisenberg spin chains with spin magnitudes using the density-matrix r…
Asymptotically exact solution of the multi-channel resonant-level model
G. M. Zhang, Z. B. Su, L. Yu
An asymptotically exact partition function of the multi-channel resonant-level model is obtained through Tomonaga-Luttinger bosonization. A Fermi-liquid vs non-Fermi-liquid transit…