Magnetic polarons in Y-Ba-Cu-O chains

被引：2
|
作者：
Eremenko, VV [1 ]
Lukashev, DV [1 ]
Ponomarchuk, BL [1 ]
机构：
[1] Ukrainian Acad Sci, BI Verkin Physicotech Inst Low Temp, UA-61103 Kharkov, Ukraine
来源：
LOW TEMPERATURE PHYSICS | 2002年 / 28卷 / 11期
关键词：
D O I：
10.1063/1.1528574
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Mossbauer spectroscopy is used to study electron self-localization in the superconducting cuprate paramagnetic compound Y-Ba-Cu-O. It is shown that the electrons in chains with self-localization form a phase with local magnetic ordering and relaxation time greater than 10(-7) s. Analysis of the magnitude of the accompanying charge redistribution suggests that when an electron undergoes self-localization a pair of exchange-coupled electrons localized predominantly on the oxygen is formed. Such a quasiparticle, consisting of a pair of antiferromagnetically oriented atomic moments and a pair of self-localized electrons, possesses integral spin and can form a Bose condensate. (C) 2002 American Institute of Physics.
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收藏
页码：830 / 841
页数：12
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