Understanding the role of the local structure in the second order structural phase transition of La2-xAxCuO4 (A = Ba, Sr)

被引：0
|
作者：
Bozin, ES [1 ]
Billinge, SJL
Kwei, GH
机构：
[1] Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA
[2] Michigan State Univ, Ctr Fundamental Mat Res, E Lansing, MI 48824 USA
[3] Univ Calif Los Alamos Natl Lab, Los Alamos, NM 87545 USA
来源：
SOLID STATE PHENOMENA | 1998年 / 61-2卷
关键词：
local structure; structural phase transition; pair distribution function; neutron powder diffraction; high temperature superconductors;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We have studied the local atomic structure of La(2-x)A(x)CuO(4) (A=Ba, Sr) through the high-temperature tetragonal (HTT) to low temperature orthorhombic (LTO) structural phase transition using the atomic pair distribution function technique. Although long-range ordered tilts disappear in the average structure, we show that significant local tilts persist. We propose an order-disorder model which reconciles both the local and long-range structural observations.
引用
收藏
页码：271 / 274
页数：4
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