Experimental observation of Bose condensation in high-temperature superconductors

被引：7

作者：

Seregin, NP ^{[1
]}

Seregin, PP ^{[1
]}

机构：

[1] St Petersburg State Tech Univ, St Petersburg 195251, Russia

来源：

JOURNAL OF EXPERIMENTAL AND THEORETICAL PHYSICS | 2000年 / 91卷 / 06期

关键词：

D O I：

10.1134/1.1342890

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Emission Mossbauer spectroscopy on Cu-67 (Zn-67) and Ga-67 (Zn-67) isotopes was used to show that for the superconductors Nd1.85Ce0.15CuO4, La1.85Sr0.15CuO4, and Tl2Ba2CaCuO8 in the temperature range T > T-c the temperature dependence of the center of gravity S of the Mossbauer spectrum is determined by the second-order Doppler shift, while in the range T < T-c the Bose condensation of Cooper pairs influences the value of S (here T-c is the superconducting transition temperature). The spatial nonuniformity produced in the electron density by a Bose condensate of Cooper pairs was observed for La1.85Sr0.15CuO4. (C) 2000 MAIK "Nauka/Interperiodica".

引用

页码：1230 / 1234

页数：5

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