Parity-affected superconductivity in ultrasmall metallic grains

被引：163

作者：

vonDelft, J ^{[1
]}

Zaikin, AD ^{[1
]}

Golubev, DS ^{[1
]}

Tichy, W ^{[1
]}

机构：

[1] PN LEBEDEV PHYS INST,MOSCOW 117924,RUSSIA

来源：

PHYSICAL REVIEW LETTERS | 1996年 / 77卷 / 15期

关键词：

D O I：

10.1103/PhysRevLett.77.3189

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate the breakdown of BCS superconductivity in ultrasmall metallic grains as a function of particle size (characterized by the mean spacing d between discrete electronic eigenstates), and the parity (P = even/odd) of the number of electrons on the island. Assuming equally spaced levels, we solve the parity-dependent BCS gap equation for the pairing parameter Delta(P)(d, T). The T = 0 critical level spacing d(c,P), the critical temperature T-c,T-P(d) (at which Delta(P) = 0), and the condensation energy E(P) are parity dependent, and all are so much smaller in the odd than the even case that this should manifest itself in current experiments.

引用

页码：3189 / 3192

页数：4

共 15 条

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Anderson P. W., 1959, J PHYS CHEM SOLIDS, V11, P28

[2]

[Anonymous], MAT FYS SKRIF KONG D

[3]

[Anonymous], [No title captured]

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