Effects of oxygen-vacancies in high-temperature cuprate superconductors

• Main Authors: Matsunaka, Daisuke, Rodulfo, Emmanuel T., Kasai, Hideaki
• Format: text
• Published: Animo Repository 2005
• Subjects: High temperature superconductors; Electron-electron interactions; Physics
• Online Access: https://animorepository.dlsu.edu.ph/faculty_research/1233; https://animorepository.dlsu.edu.ph/context/faculty_research/article/2232/type/native/viewcontent
• Institution: De La Salle University

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.