ON THE ASYMMETRIC NEXT-NEAREST-NEIGHBOR ISING-MODEL OF OXYGEN ORDERING IN YBA2CU3OZ

被引：34

作者：

DEFONTAINE, D

ASTA, M

CEDER, G

MCCORMACK, R

VANTENDELOO, G

机构：

[1] LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720

[2] MIT,DEPT MAT SCI & ENGN,CAMBRIDGE,MA 02139

[3] UNIV ANTWERP,RIJKSUNIV CTR ANTWERP,B-2020 ANTWERP,BELGIUM

来源：

EUROPHYSICS LETTERS | 1992年 / 19卷 / 03期

关键词：

PEROVSKITE PHASE SUPERCONDUCTORS; CRYSTALLOGRAPHIC ASPECTS OF POLYMORPHIC AND ORDER-DISORDER TRANSFORMATIONS; ORDER-DISORDER AND STATISTICAL MECHANICS OF MODEL SYSTEMS;

D O I：

10.1209/0295-5075/19/3/013

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Basic results concerning oxygen ordering in the superconducting compound YBa2Cu3Oz are briefly summarized. It is shown that, at equilibrium, only infinite-chain structures can be stabilized and those models based on hypothetical (and actually nonphysical) screened Coulomb interactions cannot produce stable ground states. It is suggested that diffraction data (neutrons, X-rays, electrons) from oxygen-lean samples are indicative of metastable displacive transformations, and are not directly related to oxygen ordering.

引用

页码：229 / 234

页数：6

共 21 条

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