DYNAMIC CONDUCTIVITY AND COHERENCE PEAK IN YBA2CU3O7 SUPERCONDUCTORS

被引：244

作者：

NUSS, MC ^{[1
]}

MANKIEWICH, PM ^{[1
]}

OMALLEY, ML ^{[1
]}

WESTERWICK, EH ^{[1
]}

LITTLEWOOD, PB ^{[1
]}

机构：

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

来源：

PHYSICAL REVIEW LETTERS | 1991年 / 66卷 / 25期

关键词：

D O I：

10.1103/PhysRevLett.66.3305

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We measure directly both the real and imaginary parts of the sub-band-gap conductivity-sigma in YBa2Cu3O7 in the 15-80 cm-1 frequency range using coherent time-domain terahertz spectroscopy. We observe a peak in the real part-sigma-1 similar to the coherence peak expected in an s-wave BCS superconductor. The absence of such a peak in NMR relaxation-rate experiments suggests that its origin lies in a strongly temperature-dependent inelastic-scattering rate rather than in coherence factors.

引用

收藏

页码：3305 / 3308

页数：4

相关论文

共 32 条

[1] THEORY OF SUPERCONDUCTIVITY [J].

BARDEEN, J ;

COOPER, LN ;

SCHRIEFFER, JR .

PHYSICAL REVIEW, 1957, 108 (05) :1175-1204

[2]

BESSAU DS, 1991, PHYS REV LETT, V66, P2160

[3] SPIN DYNAMICS AT OXYGEN SITES IN YBA2CU3O7 - COMMENT [J].

COFFEY, L .

PHYSICAL REVIEW LETTERS, 1990, 64 (09) :1071-1071

[4] DYNAMIC PROPERTIES OF A HIGH-TC SUPERCONDUCTOR - DIRECT EVIDENCE FOR NON-BCS BEHAVIOR [J].

COLLINS, RT ;

SCHLESINGER, Z ;

HOLTZBERG, F ;

FEILD, C ;

WELP, U ;

CRABTREE, GW ;

LIU, JZ ;

FANG, Y .

PHYSICAL REVIEW B, 1991, 43 (10) :8701-8704

[5] RENORMALIZATION OF THE MEAN-FIELD SUPERCONDUCTING PENETRATION DEPTH IN EPITAXIAL YBA2CU3O7 FILMS [J].

FIORY, AT ;

HEBARD, AF ;

MANKIEWICH, PM ;

HOWARD, RE .

PHYSICAL REVIEW LETTERS, 1988, 61 (12) :1419-1422

[6] FAR-INFRARED TRANSMISSION STUDY OF SINGLE-CRYSTAL BI2SR2CA1CU2OX SUPERCONDUCTORS [J].

FORRO, L ;

CARR, GL ;

WILLIAMS, GP ;

MANDRUS, D ;

MIHALY, L .

PHYSICAL REVIEW LETTERS, 1990, 65 (15) :1941-1944

[7] THZ TIME-DOMAIN SPECTROSCOPY OF HIGH-TC SUBSTRATES [J].

GRISCHKOWSKY, D ;

KEIDING, S .

APPLIED PHYSICS LETTERS, 1990, 57 (10) :1055-1057

[8] FAR-INFRARED TIME-DOMAIN SPECTROSCOPY WITH TERAHERTZ BEAMS OF DIELECTRICS AND SEMICONDUCTORS [J].

GRISCHKOWSKY, D ;

KEIDING, S ;

VANEXTER, M ;

FATTINGER, C .

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS, 1990, 7 (10) :2006-2015

[9] SPIN DYNAMICS AT OXYGEN SITES IN YBA2CU3O7 [J].

HAMMEL, PC ;

TAKIGAWA, M ;

HEFFNER, RH ;

FISK, Z ;

OTT, KC .

PHYSICAL REVIEW LETTERS, 1989, 63 (18) :1992-1995

[10] MAGNETIC PENETRATION DEPTH IN SINGLE-CRYSTAL YBA2CU3O7-DELTA [J].

HARSHMAN, DR ;

SCHNEEMEYER, LF ;

WASZCZAK, JV ;

AEPPLI, G ;

CAVA, RJ ;

BATLOGG, B ;

RUPP, LW ;

ANSALDO, EJ ;

WILLIAMS, DL .

PHYSICAL REVIEW B, 1989, 39 (01) :851-854

← 1 2 3 4 →