A TUNNELLING STUDY OF THE OXIDE SUPERCONDUCTORS LA2-XSRXCUO4-Y AND EUBA2CU3O7

被引：40

作者：

BULAEVSKII, LN ^{[1
]}

DOLGOV, OV ^{[1
]}

KAZAKOV, IP ^{[1
]}

MAKSIMOVSKII, SN ^{[1
]}

PTITSYN, MO ^{[1
]}

STEPANOV, VA ^{[1
]}

VEDENEEV, SI ^{[1
]}

机构：

[1] SWISS FED INST TECHNOL,CH-8093 ZURICH,SWITZERLAND

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 1988年 / 1卷 / 04期

关键词：

Ceramic Materials - Europium Compounds - Lanthanum Compounds;

D O I：

10.1088/0953-2048/1/4/011

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Measurements of the point contact tunnelling spectra of the superconductors La2-xSrxCuO4-y and EuBa2Cu3O7 with Nb were performed. The superconducting gap Δ at 4.2 K with a ratio 2Δ/Tc of about 10 was obtained. The structure of the tunnelling spectra at voltages above the gap shows that pairing originates from the electron-electron interaction via phonons and possibly via some other excitations of electronic nature with energy about 100 meV.

引用

页码：205 / 209

页数：5

共 13 条

[1]

GALKIN AA, 1974, ZH EKSP TEOR FIZ+, V66, P2262

[2]

GRAY KE, 1987, PREPRINT ARGONNE NAT

[3]

KAPITULNIK A, 1987, PREPRINT STANFORD U

[4]

KAWABE W, 1987, J APPL PHYS S, V26, P1135