EVIDENCE FOR THE SUPERCONDUCTING GAP FROM INFRARED REFLECTION AND PHONON ANOMALIES IN SUBSTITUTED YBACUO

被引：18

作者：

KUZMANY, H

SUMETSBERGER, B

MATUS, M

ZACHMANN, G

机构：

[1] LUDWIG BOLTZMANN INST FESTKORPERPHYS,A-1090 VIENNA,AUSTRIA

[2] BRUKER ANALYT MESSTECH GMBH,W-7500 KARLSRUHE,GERMANY

来源：

EUROPHYSICS LETTERS | 1990年 / 12卷 / 08期

关键词：

D O I：

10.1209/0295-5075/12/8/006

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report experimental results from IR-reflectivity between 4.2 K and 300 K for substituted 123-ceramics with different T, and different approach to the dirty-limit condition. The results show a scaling of the reflectivity increase with T, and with approaching the dirty limit on cooling through T,. Phonon hardening and softening at T, agreed with theoretical predictions if a symmetry-dependent response to the gap is assumed. The BCS-ratio for the caxis gap is deduced to be 1.7&TC. © 1990 IOP Publishing Ltd.

引用

页码：703 / 708

页数：6

共 20 条

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[7] EFFECT OF OXYGEN STOICHIOMETRY ON SOFTENING OF RAMAN ACTIVE LATTICE MODES IN YBA2CU3OX [J].

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[9] FREQUENCIES, EIGENVECTORS, AND SINGLE-CRYSTAL SELECTION-RULES OF K=0 PHONONS IN YBA2CU3O7-DELTA - THEORY AND EXPERIMENT [J].

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[10] OXYGEN DOPING OF TETRAGONAL YBA2(CU,GA)3OX SUPERCONDUCTORS [J].

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