An electronic mechanism for superconductivity in MgB2

被引：11
|
作者：
Kohno, H
Miyake, K
Harima, H
机构：
[1] Osaka Univ, Dept Phys Sci, Grad Sch Engn Sci, Toyonaka, Osaka 5608531, Japan
[2] Osaka Univ, Inst Sci & Ind Res, Ibaraki, Osaka 5670047, Japan
来源：
PHYSICA B-CONDENSED MATTER | 2002年 / 312卷
关键词：
superconductivity; two-dimensional electron gas; Coulomb interaction; MgB2;
D O I：
10.1016/S0921-4526(01)01190-5
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
An electronic mechanism for the superconductivity in MgB2 is proposed on the basis of a picture that the B-p(a) band electrons are a realization of the two-dimensional low-density electron gas. With the RPA screened Coulomb interaction, we solve the linearized gap equation to obtain the transition temperature and the gap function for a range of electron density. The 'isotope effect' is also discussed within this picture. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：148 / 149
页数：2
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