Influence of displacement of oxygen atoms in chains on the electronic structure of YBa2Cu3O7

V. I. Anisimov, M. A. Korotin, I. V. Afanas'yev

Research output: Contribution to journalArticlepeer-review

Abstract

There have been a number of recent works on calculation of the electronic structure of high-temperature superconductors. The crystal structure of YBa2Cu3O7 with unit cell consisting of 13 atoms (eight of which are non-equivalent) has been determined. Atoms Oxy(1) and Oxy(2), together with Cu2, form a copper-oxygen layer. The oxygen atoms Oy and Oz surround Cu1, forming a copper-oxygen chain Oy-Cu1Oy. Neutron diffraction investigations have shown that the oxygen atoms in the chains have vibration amplitude several times larger than any others. Furthermore, these vibrations are highly anisotropic, with greatest amplitude along the z axis. It is interesting, therefore, to examine the influence that these vibrations have on the electronic structure.

Original languageEnglish
Pages (from-to)191-193
Number of pages3
JournalPhysics of Metals and Metallography
Volume66
Issue number5
Publication statusPublished - 1988
Externally publishedYes

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