On the Nature of the `Quasiparticle' Peak in the Angular Resolved Spectrum of the Superconducting Underdoped Bi$_2$Sr$_2$CaCu$_2$O$_8$

A. V. Rozhkov

doi:10.1140/epjb/e2003-00260-x

paper

On the Nature of the `Quasiparticle' Peak in the Angular Resolved Spectrum of the Superconducting Underdoped Bi $_{2}$ Sr $_{2}$ CaCu $_{2}$ O $_{8}$

arXiv:cond-mat/0201448 · doi:10.1140/epjb/e2003-00260-x

Abstract

We study the reconfiguration of the angular resolved photoemission spectrum near $M$ point which occurs in Bi $_{2}$ Sr $_{2}$ CaCu $_{2}$ O $_{8}$ 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.

10 pages, 4 figures

On the Nature of the `Quasiparticle' Peak in the Angular Resolved Spectrum of the Superconducting Underdoped Bi2​Sr2​CaCu2​O8​

Abstract

On the Nature of the `Quasiparticle' Peak in the Angular Resolved Spectrum of the Superconducting Underdoped Bi $_{2}$ Sr $_{2}$ CaCu $_{2}$ O $_{8}$