Why is the Cu(2) Asymmetry Parameter of NQR Spectra in HTSC so Small?-Reference-Cited by-同舟云学术

Why is the Cu(2) Asymmetry Parameter of NQR Spectra in HTSC so Small?

Published:1994-02-01 Issue:1-2 Volume:49 Page:385-388
ISSN:1865-7109
Container-title:Zeitschrift für Naturforschung A
language:en
Short-container-title:

Author:

Eremin M. V.¹

Affiliation:

1. Physik-Institut, Universität Zürich, Zürich, Switzerland and Physics Department Kazan State University, Kazan 420008, Russia

Abstract

Abstract An explanation has been proposed for the unusual behaviour of the asymmetry parameter of NQR spectra of Cu(2) in layered cuprates. When holes are introduced into the plane, Zhang-Rice singlets (ZRS) appear which have a strong vibronic coupling to tetragonal and orthorhombic modes. The equation for the adiabatic potential has been derived. It is shown that its minimum, correspond ing to orthorhombic distortions of the oxygen plaquette around the Cu(2) ions, changes under doping to tetragonal character due to the singlet exchange coupling between copper and oxygen holes. A strong interaction of ZRS via the phonon field has been found.

Publisher

Walter de Gruyter GmbH

Subject

Physical and Theoretical Chemistry,General Physics and Astronomy,Mathematical Physics

Link

https://www.degruyter.com/document/doi/10.1515/zna-1994-1-257/pdf

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