Fermionic Heisenberg Glasses with BCS Pairing Interaction

S. G. Magalhaes; A. A. Schmidt

Fermionic Heisenberg Glasses with BCS Pairing Interaction

统计力学 2007-05-23 v1 无序系统与神经网络超导电性

作者: S. G. Magalhaes , A. A. Schmidt

摘要

We have analyzed a fermionic infinite-ranged quantum Heisenberg spin glass with BCS coupling in real space in the presence of a magnetic field. It has been possible to locate the transition line between the normal paramagnetic phase (NP) and the phase where there is a long range order corresponding to pair formation in sites (PAIR). The nature of the transition line is also investigated. This transition ends at Tf, the transition temperature between NP and spin glass phase (SG) where the static approximation and replica symmetry ansatz are reliable.

关键词

spin glasses bcs-bec crossover quantum spin chains

引用

@article{arxiv.cond-mat/0008263,
  title  = {Fermionic Heisenberg Glasses with BCS Pairing Interaction},
  author = {S. G. Magalhaes and A. A. Schmidt},
  journal= {arXiv preprint arXiv:cond-mat/0008263},
  year   = {2007}
}