Nature of the pseudogap in the optical conductivity of oxygen-deficient YBa2Cu3Ox

被引：11

作者：

Abrikosov, AA

机构：

[1] Materials Science Division, Argonne National Laboratory, Argonne, IL 60439

来源：

PHYSICAL REVIEW B | 1996年 / 54卷 / 17期

关键词：

D O I：

10.1103/PhysRevB.54.12003

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The pseudogap in the c-axis optical conductivity of oxygen-deficient YBa2Cu3Ox is explained on the basis of the resonant tunneling through the barrier between the CuO2 planes with the use of localized centers formed on place of the CuO chains. The conductivity as a function of frequency has a maximum, and its location and magnitude depend only on the spectrum of resonant levels, and hence do not depend on temperature. In the case of a fully oxygenated substance the chains are complete, and no resonance centers are formed. These features were observed in experiment. Comparison is done with existing data. Other possible mechanisms of the pseudogap formation are briefly discussed.

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页码：12003 / 12005

页数：3

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