SUPERCONDUCTING ENERGY-GAP FROM INFRARED RESPONSE MEASUREMENTS IN ANTIGRANULOCYTES TL2BA2CACU2O8 FILMS

被引：14

作者：

LENGFELLNER, H

SCHNEIDER, G

BETZ, J

HOGAN, M

PRETTL, W

RENK, KF

机构：

[1] Institut für Angewandte Physik, Universität Regensburg, Regensburg

来源：

EUROPHYSICS LETTERS | 1991年 / 15卷 / 03期

关键词：

D O I：

10.1209/0295-5075/15/3/019

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The resistance response of polycrystalline Tl2Ba2CaCu2O8 films to short laser pulses has been investigated for a wide range of far-infrared frequencies. For temperatures T << T(c) a drastic change in response time is observed at a critical frequency nu(c) congruent-to 4 THz. The time constant increases from about 1 ns at nu < nu(c) to 1 mu-s at nu > nu(c). The critical frequency is attributed to a superconducting energy gap with 2-DELTA(0)/k(B) T(c) congruent-to 2.

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页码：343 / 347

页数：5

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