MgB_2 比热的现象学双隙模型
超导电性
2009-11-07 v2
摘要
我们表明，超导体 MgB_2 (MgB2) 的比热在零场条件下，对于其中显著的非-BCS 特征， 可以在整个温度范围内通过现象学双隙模型来拟合——误差基本上在实验误差范围内。所得隙参数与来自能带结构计算、以及各种谱光学实验的先前确定值一致。来自比热的确定——一种体积性性质——表明 MgB_2 中存在两个超导隙是一种体积效应。
引用
@article{arxiv.cond-mat/0107196,
title = {Phenomenological two-gap model for the specific heat of MgB_2},
author = {F. Bouquet and Y. Wang and R. A. Fisher and D. G. Hinks and J. D. Jorgensen and A. Junod and N. E. Phillips},
journal= {arXiv preprint arXiv:cond-mat/0107196},
year = {2009}
}
备注
7 pages, 4 figures Accepted for publication in Europhysics Letters Text is unchanged. Figure 1 was made clearer (labels). We tried to update cond-mat references from the bibliography which were published (before october 5th)