We analyze evolution of the single particle excitation spectrum of the underdoped cuprate superconductors near the anti-nodal region, considering temperatures below and and above the phase transition. We inspect the phenomenological self-energy that reproduces the angle-resolved-photoemission-spectroscopy (ARPES) data and we show that above the critical temperature, such procedure implies a transfer of the spectral weight from the Bogoliubov-type quasiparticles towards the in-gap damped states. We also discuss some possible microscopic arguments explaining this process.
@article{arxiv.1601.01592,
title = {Quasiparticle states driven by a scattering on the preformed electron pairs},
author = {T. Domanski},
journal= {arXiv preprint arXiv:1601.01592},
year = {2016}
}