Multiband superconductivity in high Tc cuprates and diborides

被引：19

作者：

Bianconi, A ^{[1
]}

机构：

[1] Univ Roma La Sapienza, Dept Phys, I-00185 Rome, Italy

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2006年 / 67卷 / 1-3期

关键词：

D O I：

10.1016/j.jpcs.2005.10.160

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The normal state of magnesium diboride, the simplest metallic system showing the macroscopic quantum coherence at high temperature (high T. superconductivity HTcS), shows some features that are common with the cuprates, shedding light on the pairing mechanism for T-c amplification in HTcS: (1) the system is made of two or more electronic components associated with multiple Fermi surface portions; (2) the chemical potential is tuned where the Fermi level in one Fermi surface portion is near the crossing of an electronic topological transition (ETT) where the Fermi surface changes its topology; and (3) an optical phonon branch shows softening due to an extended Khon anomaly (EKA) over a large wave vector range. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：567 / 570

页数：4

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