7 papers
Majorana fermion formulation of the two channel Kondo model
G. -M. Zhang, A. C. Hewson, R. Bulla
We show that a Majorana fermion description of the two channel Kondo model can emerge quite naturally as a representation of the algebra associated with the spin currents in the tw…
Low energy fixed points of the sigma-tau and the O(3) symmetric Anderson models
R. Bulla, A. C. Hewson, G. -M. Zhang
We study the single channel (compactified) models, the sigma-tau model and the O(3) symmetric Anderson model, which were introduced by Coleman et al., and Coleman and Schofield, as…
Non-Fermi liquid theory of a compactified Anderson single-impurity model
Guang-Ming Zhang, A. C. Hewson
We consider a version of the symmetric Anderson impurity model (compactified) which has a non-Fermi liquid weak coupling regime. We find that in the Majorana fermion representation…
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…
Asymptotically exact solution of a local copper-oxide model
Guang-Ming Zhang, Lu Yu
We present an asymptotically exact solution of a local copper-oxide model abstracted from the multi-band models. The phase diagram is obtained through the renormalization-group ana…
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…