INVESTIGATION OF THE SUPERCONDUCTING GAP IN LA2-XSRXCUO4 BY RAMAN-SPECTROSCOPY

被引：116

作者：

CHEN, XK

IRWIN, JC

TRODAHL, HJ

KIMURA, T

KISHIO, K

机构：

[1] UNIV BRITISH COLUMBIA,DEPT PHYS,VANCOUVER V5A 1S6,BC,CANADA

[2] UNIV TOKYO,DEPT AGR CHEM,TOKYO 113,JAPAN

[3] VICTORIA UNIV WELLINGTON,DEPT PHYS,WELLINGTON,NEW ZEALAND

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 73卷 / 24期

关键词：

D O I：

10.1103/PhysRevLett.73.3290

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The low energy Raman spectra of a La1.83Sr.17CuO4 single crystal have been measured at temperatures above and below Tc. The redistribution of the electronic continua that occurs as a result of the opening of the superconducting gap has been observed. Based on the polarization dependence of the continua, it is concluded that the superconducting gap Δ(k) is anisotropic, with nodes along the (±1, ±1) directions and maxima along the (0, ±1) and (±1, 0) directions. The maximum pairing energy 2|Δmax| is estimated to be about 7.7kTc. © 1994 The American Physical Society.

引用

页码：3290 / 3293

页数：4

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