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Polaronic metal in lightly doped high-Tc cuprates

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arxiv 1109.4502 v1 pith:QJS5GOME submitted 2011-09-21 cond-mat.str-el

Polaronic metal in lightly doped high-Tc cuprates

A. S. Mishchenko , N. Nagaosa , K. M. Shen , Z.-X. Shen , X. J. Zhou , T. P. Devereaux This is my paper
classification cond-mat.str-el
keywords cupratesunderdopedarpespolaronicangle-resolved-photoemissionanti-nodalapproximationaway
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We present a combined study of the angle-resolved-photoemission spectroscopy (ARPES) and quantum Monte Carlo simulations to propose a novel polaronic metallic state in underdoped cuprates. An approximation scheme is proposed to represent underdoped cuprates away from 1/2 filling, replacing the many-body Hamiltonian by that of a single polaron with effective electron-phonon interaction (EPI), that successfully explains many puzzles such as a large momentum-dependent dichotomy between nodal and anti-nodal directions, and an unconventional doping dependence of ARPES in the underdoped region.

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