From semiconductors to superconductors:: a simple model for pseudogaps

被引:56
作者
Nozières, P [1 ]
Pistolesi, F [1 ]
机构
[1] Inst Max Von Laue Paul Langevin, F-38042 Grenoble 9, France
关键词
D O I
10.1007/s100510050897
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
We consider a two-dimensional semiconductor with a local attraction among the carriers. We study the ground state of this system as a function of the semiconductor gap. We find a direct transition from a superconducting to an insulating phase for no doping at a critical value; the single particle excitations being always gapped. For finite doping we find a smooth crossover. We calculate the critical temperature due to both the particle excitations and the Berezinkii-Kosterlitz-Thouless transition.
引用
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页码:649 / 662
页数:14
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