Microscopic charge inhomogeneities in underdoped La2-xSrxCuO4:: Local structural evidence underdoped

被引:13
作者
Billinge, SJL [1 ]
Bozin, ES
Gutmann, M
Takagi, H
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 Tokyo, Inst Solid State Phys, Minato Ku, Tokyo 106, Japan
来源
JOURNAL OF SUPERCONDUCTIVITY | 2000年 / 13卷 / 05期
关键词
charge inhomogeneities; underdoped La2-xSrxCuO4; local structure;
D O I
10.1023/A:1007801928742
中图分类号
O59 [应用物理学];
学科分类号
摘要
We present local structural evidence for the existence of charge inhomogeneities at low temperature in underdoped and optimally doped La2-xSrxCuO4. The inhomogeneities disappear for x greater than or equal to 0.2. The evidence for the charge inhomogeneities comes from an anomalous increase in the inplane Cu-O bond length distribution in the underdoped samples as well as evidence for CuO6 octahedral tilt inhomogeneities in the intermediate range structure. Preliminary analysis of the temperature dependence of this phenomenon indicates that the inhomogeneities set in at temperatures in the range 60 K < T<infinity> < 130 K, which depends on doping.
引用
收藏
页码:713 / 722
页数:10
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