Implication of the Mott-limit violation in high-Tc cuprates

Details Implication of the Mott-limit violation in high-Tc cuprates Implication of the Mott-limit violation in high-Tc cuprates

2007-11-27

arxiv.org/abs/0711.4213v1

Physics

Condensed Matter

Superconductivity

5 pages, 5 figures; manuscript for the Proceedings of SNS2007 to be published as a Special Issue of the Journal of Physics and

Scientific paper

10.1016/j.jpcs.2008.06.074

The Fermi arc is a striking manifestation of the strong-correlation physics in high-T_c cuprates. In this paper, implications of the metallic transport in the lightly hole-doped regime of the cuprates, where the Fermi arcs are found, are examined in conjunction with competing interpretations of the Fermi arcs in terms of small hole pockets or a large underlying Fermi surface. It is discussed that the latter picture provides a more natural understanding of the metallic transport in view of the Mott-limit argument. Furthermore, it is shown that a suitable modeling of the Fermi arcs in the framework of the Boltzmann theory allows us to intuitively understand why the transport properties are apparently determined by a "small" carrier density even when the underlying Fermi surface, and hence k_F, is large.

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