Pseudogap and superconducting gap in the electronic Raman spectra of underdoped cuprates

被引：13

作者：

Opel, M ^{[1
]}

Nemetschek, R

Hoffmann, C

Müller, PF

Philipp, R

Hackl, R

Berger, H

Forró, L

Erb, A

Walker, E

机构：

[1] Bayer Akad Wissensch, Walther Meissner Inst, D-85748 Garching, Germany

[2] Ecole Polytech Fed Lausanne, Ecublens, CH-1015 Lausanne, Switzerland

[3] Univ Geneva, Dept Phys Mat Condensee, CH-1211 Geneva, Switzerland

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 1998年 / 59卷 / 10-12期

关键词：

D O I：

10.1016/S0022-3697(98)00140-1

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Raman spectra of underdoped cuprate superconductors have been studied fur different polarizations and temperatures. Strong anisotropies show up in both the normal and superconducting state. In the normal state below T* approximate to 200K, a pseudogap Delta* is found near(pi,0) with an energy scale close to that of the magnetic exchange interaction J. Superconducting gap excitations are found only at B-2g symmetry and suggest d(x)2(-y)2 pairing with an amplitude Delta(o) of 8kT(c), similar to all other doping levels.lC. Raman spectroscopy, cuprate superconductors. pseudogap, superconducting gap, gap symmetry.

引用

页码：1942 / 1946

页数：5

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