Anomalous thermal expansion of high-temperature superconductors at low temperatures

被引：4
|
作者：
Golovashkin, A. I.
Rusakov, A. P.
机构：
[1] Russian Acad Sci, PN Lebedev Phys Inst, Moscow 119991, Russia
[2] Moscow State Inst Steel & Alloys, Moscow 117936, Russia
来源：
PHYSICS OF THE SOLID STATE | 2007年 / 49卷 / 08期
基金：
俄罗斯基础研究基金会;
关键词：
D O I：
10.1134/S1063783407080045
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The origins of the anomalous (negative) thermal expansion of high-temperature superconductors (HTSCs) and of the anomalously strong effect of a magnetic field on the thermal expansion coefficient at low temperatures are discussed. A physical model is proposed based on the stabilizing influence of a charge density wave (CDW) arising in the oxygen sublattice in addition to the antiferromagnetic and spin-Peierls ordering in the copper ion sublattice of an HTSC compound. The effects of temperature, magnetic field, and doping on the interaction of such a CDW with the ionic subsystem of an HTSC compound are studied. The conclusions derived from the model are in agreement with experimental data.
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页码：1429 / 1434
页数：6
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