Experimental observation of Bose condensation in high-temperature superconductors

被引：0
|
作者：
N. P. Seregin
P. P. Seregin
机构：
[1] St. Petersburg State Technical University,
来源：
Journal of Experimental and Theoretical Physics | 2000年 / 91卷
关键词：
Spectroscopy; State Physics; Transition Temperature; Field Theory; Elementary Particle;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Emission Mössbauer spectroscopy on 67Cu (67Zn) and 67Ga (67Zn) isotopes was used to show that for the superconductors Nd1.85Ce0.15CuO4, La1.85 Sr0.15CuO4, and Tl2Ba2 CaCuO8 in the temperature range T > Tc the temperature dependence of the center of gravity S of the Mössbauer spectrum is determined by the second-order Doppler shift, while in the range T < Tc the Bose condensation of Cooper pairs influences the value of S (here Tc is the superconducting transition temperature). The spatial nonuniformity produced in the electron density by a Bose condensate of Cooper pairs was observed for La1.85 Sr0.15CuO4.
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页码：1230 / 1234
页数：4
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