FAR-INFRARED TRANSMISSION OF BA1-XKXBIO3 THIN-FILMS

被引：11

作者：

DUNMORE, FJ

DREW, HD

NICOL, EJ

HELLMAN, ES

HARTFORD, EH

机构：

[1] UNIV CALIF SANTA BARBARA,DEPT PHYS,SANTA BARBARA,CA 93106

[2] AT&T BELL LABS,MURRAY HILL,NJ 07974

来源：

PHYSICAL REVIEW B | 1994年 / 50卷 / 01期

关键词：

D O I：

10.1103/PhysRevB.50.643

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The far-infrared transmission of Ba1-xKxBiO3 thin films, grown on MgO substrates, was measured in the frequency range from 15 to 200 cm-1, and temperature range from 9 to 100 K. There is a BCS-like peak in the transmission spectrum. The strong-coupling Eliashberg theory gives a better description of the optical data than the weak-coupling Mattis-Bardeen theory. For a T(c) = 18 K sample the Eliashberg fits give a London penetration depth of 5500 +/- 100 angstrom and an energy gap 2 DELTA(0) = 4.0 +/- 0.1kT(c)(6.2 meV).

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页码：643 / 646

页数：4

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