Temperature Dependence of Even-Odd Effects in Small Superconducting Systems
Superconductivity
2007-05-23 v1 Nuclear Theory
Abstract
Generalized BCS equations which consistently include the projection on the particle-number parity are derived from a systematic variational method. Numerical solutions are given that are illustrative of ultra-small metallic grains. Compared to the BCS approximation, the pairing is slightly enhanced in even and noticeably inhibited in odd systems. In the latter case, the gap increases with T near T=0; for a suitably small pairing this can result in a reentrance phenomenon. Paramagnetic effects are evaluated as functions of the temperature and the magnetic field.
Keywords
Cite
@article{arxiv.cond-mat/9802006,
title = {Temperature Dependence of Even-Odd Effects in Small Superconducting Systems},
author = {R. Balian and H. Flocard and M. Veneroni},
journal= {arXiv preprint arXiv:cond-mat/9802006},
year = {2007}
}
Comments
File in RevTeX format, 4 pages, 3 figures in .ps format