Superconducting correlations in ultra-small metallic grains
Superconductivity
2009-10-31 v1 Mesoscale and Nanoscale Physics
Abstract
To describe the crossover from the bulk BCS superconductivity to a fluctuation-dominated regime in ultrasmall metallic grains, new order parameters and correlation functions, such as ``parity gap'' and ``pair-mixing correlation function'', have been recently introduced. In this paper, we discuss the small-grain behaviour of the Penrose-Onsager-Yang off-diagonal long-range order (ODLRO) parameter in a pseudo-spin representation. Relations between the ODLRO parameter and those mentioned above are established through analytical and numerical calculations.
Cite
@article{arxiv.cond-mat/0003119,
title = {Superconducting correlations in ultra-small metallic grains},
author = {Guang-Shan Tian and Lei-Han Tang and Qing-Hu Chen},
journal= {arXiv preprint arXiv:cond-mat/0003119},
year = {2009}
}
Comments
7 pages, 1 figure