Pseudogap and charge dynamics in CuO2 planes in YBCO

被引：169

作者：

Basov, DN

Liang, R

Dabrowski, B

Bonn, DA

Hardy, WN

Timusk, T

机构：

[1] BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973

[2] UNIV BRITISH COLUMBIA,VANCOUVER,BC V6T 4M1,CANADA

[3] NO ILLINOIS UNIV,DEPT PHYS,DE KALB,IL 60115

来源：

PHYSICAL REVIEW LETTERS | 1996年 / 77卷 / 19期

关键词：

D O I：

10.1103/PhysRevLett.77.4090

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on the infrared conductivity of YBa2Cu3Ox and YBa2Cu4O8 crystals with different oxygen content and Zn doping. We find a correlation between the structure of the scattering rate spectra 1/tau(a)*(omega,T) in the CuO2 planes and the pseudogap that develops in the c-axis conductivity of underdoped samples for T < T* = 140-250 K. In the pseudogap state, the scattering rate is depressed at low frequencies and follows an omega(2 +/- 0.3) law for omega < 400 cm(-1). When the c-axis pseudogap is suppressed, either by an increase of temperature above T* or by a substitution of Cu with Zn, the spectra of 1/tau(a)*(omega, T) revert to the nearly linear omega dependence of the optimally doped compounds.

引用

页码：4090 / 4093

页数：4

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