WHY IS THE CU(2) ASYMMETRY PARAMETER OF NQR SPECTRA IN HTSC SO SMALL

被引：7

作者：

EREMIN, MV ^{[1
]}

机构：

[1] UNIV ZURICH,INST PHYS,CH-8006 ZURICH,SWITZERLAND

来源：

ZEITSCHRIFT FUR NATURFORSCHUNG SECTION A-A JOURNAL OF PHYSICAL SCIENCES | 1994年 / 49卷 / 1-2期

关键词：

NQR; SINGLET CORRELATION; ADIABATIC POTENTIAL; TETRAGONAL MODE; PHONON COUPLING;

D O I：

10.1515/zna-1994-1-257

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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, corresponding 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.

引用

页码：385 / 388

页数：4

共 16 条

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