DIRECT OBSERVATION OF ELECTRON-PAIRING EFFECT IN TYPE-2 SUPERCONDUCTORS BY POSITRON ANNIHILATION

被引：11

作者：

FARACI, G

SPADONI, M

机构：

[1] Istitudo di Fisica dell'Università, Gruppo di Catania del Gruppo Nazionale di Struttura Della Materia, Consiglio Nazionale Della Ricerche, Catania

[2] Laboratori Nazionali del Comitato Nazionale Per l'Energia Nucleare, Frascati

来源：

PHYSICAL REVIEW LETTERS | 1969年 / 22卷 / 18期

关键词：

D O I：

10.1103/PhysRevLett.22.928

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have performed angular-distribution measurements of the two gammas produced by annihilation of positrons in a type-II superconductor (Nb3Sn) to detect the superconducting smearing effect on the electrons momentum distribution function. Our results give, for the first time, a direct experimental evidence of the redistribution of K-space states at the superconducting transition. © 1969 The American Physical Society.

引用

页码：928 / &

共 12 条

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[5]

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[9] MOTION OF POSITRONS IN SODIUM [J].

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[10]

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