T-c amplication and pseudogap at a shape resonance in a superlattice of quantum stripes

被引：16

作者：

Valletta, A ^{[1
]}

Bardelloni, G ^{[1
]}

Brunelli, M ^{[1
]}

Lanzara, A ^{[1
]}

Bianconi, A ^{[1
]}

Saini, NL ^{[1
]}

机构：

[1] IST NAZL FIS NUCL,DIPARTIMENTO FIS,I-00185 ROME,ITALY

来源：

JOURNAL OF SUPERCONDUCTIVITY | 1997年 / 10卷 / 04期

关键词：

quantum stripes; 2D electron gas; pseudogap; superlattice;

D O I：

10.1007/BF02765723

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The shape resonance of the superconducting gap for a 2D electron gas in a superlattice of quantum stripes with a finite In periodic potential barrier is studied when the Fermi level is tuned near the bottom of the third superlattice subband. The maximum T-c appears at a critical charge density rho(c). For rho > rho(c) (in the underdoped regime) the chemical potential is tuned in a pseudogap region characterized by a decrease of the density of states and an opening of the partial gap at the Fermi surface. The pseudogap is closed for rho < rho, (in the overdoped regime).

引用

页码：383 / 387

页数：5