The Tc amplification by quantum interference effects in diborides
Superconductivity
2011-02-01 v1
Abstract
The model of two (s and p) channel superconductivity known to be necessary to explain the superconductivity in MgB2 has been applied to the Al1-xMgxB2 diborides by tuning x from MgB2 to AlMgB4. The evolution of the interband coupling parameter (probing the strength of the interchannel pairing due to quantum interference effects) and the two gaps in the s and p channel as a function of x have been calculated. While in MgB2 the quantum interference effects give an amplification of Tc by a factor of 1.5 in comparison with the dominant intra s band single channel pairing, in AlMgB4 the amplification is about 100, in comparison with the dominant intra p band single channel pairing.
Keywords
Cite
@article{arxiv.cond-mat/0211389,
title = {The Tc amplification by quantum interference effects in diborides},
author = {Annette Bussmann-Holder and Antonio Bianconi},
journal= {arXiv preprint arXiv:cond-mat/0211389},
year = {2011}
}
Comments
7 pages, 6 figures