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arXiv 1608.01094cond-mat.supr-con
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Bi2212超导体能隙的各向异性演化

Anisotropic evolution of energy gap in Bi2212 superconductor

Artur P. Durajski

摘要:

本文系统地分析了欠掺杂Bi 2212超导体的能隙随温度和空穴掺杂水平的变化。在包含电子-声子和电子-电子-声子配对机制的理论模型框架内,我们以非常高的精度再现了现代ARPES实验的测量结果。我们发现,能隙振幅是非常弱的依赖于温度,但明显依赖于掺杂水平。在高于临界温度时,存在一个非零的能隙,称为赝能隙。

英文摘要:

We present a systematic analysis of the energy gap in underdoped Bi2212 superconductor as a function of temperature and hole doping level. Within the framework of the theoretical model containing the electron-phonon and electron-electron-phonon pairing mechanism, we reproduced the measurement results of modern ARPES experiments with very high accuracy. We showed that the energy-gap amplitude is very weakly dependent on the temperature but clearly dependent on the level of doping. The evidence for a non-zero energy gap above the critical temperature, referred to as a pseudogap, was also obtained.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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