On the Nature of the `Quasiparticle' Peak in the Angular Resolved Spectrum of the Superconducting Underdoped Bi₂Sr₂CaCu₂O₈

2002/01/24 by A. V. Rozhkov
Physics and Astronomy · #cond-mat.supr-con

paper · pdf · doi:10.1140/epjb/e2003-00260-x

published as Eur. Phys. J. B 35, 103-110 (2003) · 10 pages, 4 figures

arxiv created 2002/01/24 · arxiv updated 2009/11/30

Abstract

We study the reconfiguration of the angular resolved photoemission spectrum near M point which occurs in Bi₂Sr₂CaCu₂O₈ upon cooling below the superconducting transition temperature. Restricting our attention to the case of underdoped samples we offer a phenomenological mechanism-independent argument which explains the emergence of a peak in the spectrum in terms of the normal state pseudogap. All of the basic experimental observations, including the peak dispersion, `dip-and-hump' shape of the superconducting state spectrum and appearance of the peak at the temperatures somewhat higher than T_c, are naturally explained.

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