中文

无序高-$T_c$ 铜氧化物超导体中临界温度和超流密度的抑制

超导电性 2009-10-28 v2

摘要

我们认为,在短相干长度的高-TcT_c 铜氧化物中,无序 dd-波超导体 TcT_c 的标准 Abrikosov-Gorkov (AG) 型理论失效。在 Bogoliubov-de Gennes 形式下的数值计算表明,对此类系统的正确描述必须允许序参量的空间变化,序参量在杂质附近被强烈抑制,但在其他地方基本不受影响。相对于伴随的超流密度降低所测量的 TcT_c 抑制,被发现明显弱于 AG 理论的预测,与实验吻合良好。

关键词

引用

@article{arxiv.cond-mat/9610167,
  title  = {Critical temperature and superfluid density suppression in disordered high-$T_c$ cuprate superconductors},
  author = {M. Franz and C. Kallin and A. J. Berlinsky and M. I. Salkola},
  journal= {arXiv preprint arXiv:cond-mat/9610167},
  year   = {2009}
}

备注

REVTeX, 4 pages, 3 ps figures included [The version to appear in PRB Sept. 1. Conclusions of the paper unchanged; several changes in text and figures for added clarity, discussion of phase fluctuations added.]