Title

Effects of oxygen-vacancies in high-temperature cuprate superconductors

College

College of Science

Department/Unit

Physics

Document Type

Article

Source Title

Solid State Communications

Volume

134

Issue

5

First Page

355

Last Page

360

Publication Date

5-1-2005

Abstract

We investigate the effects of oxygen vacancies on the magnetic properties and superconducting transition temperature of high-temperature cuprate superconductors. Starting with the d-p Hamiltonian, we simultaneously employ the coherent potential approximation to account for the effects of oxygen vacancies, and the fluctuation-exchange scheme to address the copper-site Coulomb interactions. Our results show that the presence of oxygen vacancies weakens the antiferromagnetic spin fluctuations of d-electrons subsequently lowering the superconducting transition temperature. © 2005 Elsevier Ltd. All rights reserved.

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Digitial Object Identifier (DOI)

10.1016/j.ssc.2005.01.039

Disciplines

Physics

Keywords

High temperature superconductors; Electron-electron interactions

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