DETERMINATION OF THE SUPERCONDUCTING GAP IN RBA2CU3O7-DELTA

被引：312

作者：

FRIEDL, B

THOMSEN, C

CARDONA, M

机构：

[1] Max-Planck-Institut für Festkörperforschung, D-7000 Stuttgart 80

来源：

PHYSICAL REVIEW LETTERS | 1990年 / 65卷 / 07期

关键词：

D O I：

10.1103/PhysRevLett.65.915

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The anomalous broadening of the B1g-like phonon of RBa2Cu3O7- observed in Raman scattering is studied as a function of phonon frequency by substituting various rare earths for R. The onset of broadening starts abruptly at a phonon energy which allows us to unambiguously determine a single, sharp superconducting gap at 2=316 cm-1. 2/kTc=4.95±0.10, i.e., RBa2Cu3O7-is a strong-coupling superconductor. We find qualitative and quantitative agreement with theory. © 1990 The American Physical Society.

引用

页码：915 / 918

页数：4

共 26 条

[1] NMR AND NQR STUDIES IN YBA2CU3O7-DELTA [J].

BRINKMANN, D .

PHYSICA C, 1988, 153 (01) :75-78

[2] INFRARED AND RAMAN-SPECTRA OF THE NEW SUPERCONDUCTING CUPRATE PEROVSKITES DYBA2CU3O7, ERBA2CU3O7, TMBA2CUBO7 [J].

CARDONA, M ;

LIU, R ;

THOMSEN, C ;

BAUER, M ;

GENZEL, L ;

KONIG, W ;

WITTLIN, A ;

AMADOR, U ;

BARAHONA, M ;

FERNANDEZ, F ;

OTERO, C ;

SAEZ, R .

SOLID STATE COMMUNICATIONS, 1988, 65 (01) :71-75

[3] INFRARED EVIDENCE FOR GAP ANISOTROPY IN YBA2CU3O7 [J].

COLLINS, RT ;

SCHLESINGER, Z ;

HOLTZBERG, F ;

FEILD, C .

PHYSICAL REVIEW LETTERS, 1989, 63 (04) :422-425

[4] RAMAN-SCATTERING FROM SUPERCONDUCTING GAP EXCITATIONS IN SINGLE-CRYSTAL YBA2CU3O7-DELTA [J].

COOPER, SL ;

KLEIN, MV ;

PAZOL, BG ;

RICE, JP ;

GINSBERG, DM .

PHYSICAL REVIEW B, 1988, 37 (10) :5920-5923

[5] GAP ANISOTROPY AND PHONON SELF-ENERGY EFFECTS IN SINGLE-CRYSTAL YBA2CU3O7-DELTA [J].

COOPER, SL ;

SLAKEY, F ;

KLEIN, MV ;

RICE, JP ;

BUKOWSKI, ED ;

GINSBERG, DM .

PHYSICAL REVIEW B, 1988, 38 (16) :11934-11937

[6] TUNNELLING MEASUREMENTS ON YBA2CU3O7 SINGLE-CRYSTALS [J].

FOURNEL, A ;

OUJIA, I ;

SORBIER, JP ;

NOEL, H ;

LEVET, JC ;

POTEL, M ;

GOUGEON, P .

EUROPHYSICS LETTERS, 1988, 6 (07) :653-658

[7] ELECTRON-TUNNELING INTO THIN-FILMS OF Y1BA2CU3O7 [J].

GEERK, J ;

XI, XX ;

LINKER, G .

ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER, 1988, 73 (03) :329-336

[8] PHONON ANOMALIES AND RANGE OF SUPERCONDUCTING ENERGY GAPS FROM INFRARED STUDIES OF YBA2CU3O7-DELTA [J].

GENZEL, L ;

WITTLIN, A ;

BAUER, M ;

CARDONA, M ;

SCHONHERR, E ;

SIMON, A .

PHYSICAL REVIEW B, 1989, 40 (04) :2170-2178

[9] CONDUCTIVITY OF SUPERCONDUCTING FILMS FOR PHOTON ENERGIES BETWEEN 0.3 AND 40K-TC [J].

GLOVER, RE ;

TINKHAM, M .

PHYSICAL REVIEW, 1957, 108 (02) :243-256

[10] REPRODUCIBLE TUNNELING DATA ON CHEMICALLY ETCHED SINGLE-CRYSTALS OF YBA2CU3O7 [J].

GURVITCH, M ;

VALLES, JM ;

CUCOLO, AM ;

DYNES, RC ;

GARNO, JP ;

SCHNEEMEYER, LF ;

WASZCZAK, JV .

PHYSICAL REVIEW LETTERS, 1989, 63 (09) :1008-1011

← 1 2 3 →