PHOTOELECTRON-SPECTROSCOPY TOWARDS THE MEV RANGE - OBSERVATION OF THE SUPERCONDUCTING TRANSITION IN NB3AL

被引：14

作者：

GRIONI, M

MALTERRE, D

DARDEL, B

IMER, JM

BAER, Y

MULLER, J

JORDA, JL

PETROFF, Y

机构：

[1] UNIV GENEVA, DEPT PHYS MAT CONDENSEE, CH-1211 GENEVA, SWITZERLAND

[2] UNIV PARIS 11, UTILISAT RAYONNEMENT ELECTROMAGNET LAB, F-91405 ORSAY, FRANCE

来源：

PHYSICAL REVIEW B | 1991年 / 43卷 / 01期

关键词：

D O I：

10.1103/PhysRevB.43.1216

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have measured with very high resolution (13 meV) the photoelectron spectrum of the conventional A15 superconductor Nb3Al above and below the bulk critical temperature of 18.6 K. Our results show spectral modifications near the Fermi level that are related to the transition to the superconducting state and are compatible with the predictions of the BCS model with T(c) = 14 K. The effect is twice as large as the Fermi-edge thermal broadening between 10 and 20 K measured in a metal in the normal state, under the same conditions. These results establish that high-resolution photoemission spectroscopy yields sound information on the electronic-states transformation due to the superconducting transition.

引用

页码：1216 / 1218

页数：3

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