Metallic stripes in oxygen doped La2CuO4

被引:16
作者
Di Castro, D [1 ]
Colapietro, M
Bianconi, G
机构
[1] Univ Roma La Sapienza, Dipartimento Fis, Unita INFM, I-00185 Rome, Italy
[2] Univ Roma La Sapienza, Dipartimento Chim, I-00185 Rome, Italy
[3] Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA
来源
INTERNATIONAL JOURNAL OF MODERN PHYSICS B | 2000年 / 14卷 / 29-31期
关键词
D O I
10.1142/S0217979200003927
中图分类号
O59 [应用物理学];
学科分类号
摘要
We have investigated the charge ordering in an oxygen doped La2CuO4 crystal by diffuse high-resolution x-ray diffraction using synchrotron radiation. The micro-strain epsilon in the CuO2 plane is close to the micro-strain Eo for the formation of static charge ordered phases. The crystal shows the co-existence of a first phase with an insulating crystal of charge strings and a second superconducting phase of "supestripes". The first insulating phase is due to charges at the critical doping 1/8 self trapped into a crystal of ordered strings of finite Length (similar to 60 Angstrom) and a commensurate period of 4 lattice units. The superconducting phase shows diffuse diffraction peaks with short coherence length due to fluctuations of stripes with an incommensurate period of about 4.8 unit cells and length longer than 500 Angstrom.
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页码:3438 / 3443
页数:6
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