Electronic Raman scattering in underdoped YBa2CU3O6.5

被引：68

作者：

Chen, XK ^{[1
]}

Naeini, JG ^{[1
]}

Hewitt, KC ^{[1
]}

Irwin, JC ^{[1
]}

Liang, R ^{[1
]}

Hardy, WN ^{[1
]}

机构：

[1] UNIV BRITISH COLUMBIA, DEPT PHYS, VANCOUVER, BC V6T 1Z1, CANADA

来源：

PHYSICAL REVIEW B | 1997年 / 56卷 / 02期

关键词：

D O I：

10.1103/PhysRevB.56.R513

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The polarized Raman spectra of underdoped YBa2Cu3O6.5, (T-c=61 K) have been measured. The XY(B-2g) spectrum exhibits a superconductivity-induced redistribution and a frequency dependence that suggests the presence of nodes near the (+/-1,+/-1) directions in k space. The X'Y'(B-1g) spectrum is unaffected by the transition to the superconducting state and the intensity I(B-1g) is significantly reduced relative to the level found in optimally doped compounds. This drop in intensity occurs because of a loss of spectral weight from the regions of the Brillouin zone near (pi,0), which is associated with the opening of a pseudogap in the underdoped compound.

引用

页码：R513 / R516

页数：4

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