Physics – Condensed Matter – Superconductivity
Scientific paper
2002-01-24
Eur. Phys. J. B 35, 103-110 (2003)
Physics
Condensed Matter
Superconductivity
10 pages, 4 figures
Scientific paper
10.1140/epjb/e2003-00260-x
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.
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