Anomalous thermal expansion of high-temperature superconductors Bi2Sr2-xLaxCuO6 at low temperatures

被引：2

作者：

Anshukova, N. V.

Golovashkin, A. I.

Ivanova, L. I.

Krynetskii, I. B.

Rusakov, A. P.

机构：

[1] Russian Acad Sci, Lebedev Inst Phys, Moscow 119991, Russia

[2] Moscow State Inst Steel & Alloys, Moscow 117936, Russia

[3] Moscow MV Lomonosov State Univ, Moscow 119992, Russia

来源：

PHYSICS OF THE SOLID STATE | 2006年 / 48卷 / 08期

基金：

俄罗斯基础研究基金会;

关键词：

74; 72; Hs; 65; 40; De;

D O I：

10.1134/S1063783406080038

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The low-temperature thermal expansion of Bi2Sr2-x LaxCuO6 single crystals with different doping levels is measured. The effect of a magnetic field on the thermal expansion of Bi2Sr2-x LaxCuO6 is studied. Anomalous (negative) thermal expansion whose characteristics depend on the doping level of the sample is revealed at T <= 10-20 K. It is found that these characteristics are significantly affected by moderately strong magnetic fields (2-4 T). The experimental results can be interpreted within a model relating the anomalous thermal expansion in high-temperature superconductors at low temperatures and the strong effect of the magnetic field on this expansion to the change in the stabilizing role of the charge-density waves in the oxygen sublattice.

引用

页码：1439 / 1446

页数：8

共 30 条

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