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Anisotropic evolution of energy gap in Bi2212 superconductor

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Abstract

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.

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  1. Institute of Physics, Czȩstochowa University of Technology, Ave. Armii Krajowej 19, 42-200, Czȩstochowa, Poland

    A. P. Durajski

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Durajski, A.P. Anisotropic evolution of energy gap in Bi2212 superconductor. Front. Phys. 11, 117408 (2016). https://doi.org/10.1007/s11467-016-0595-0

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