Evolution of the Fermi surface in phase fluctuating d-wave superconductors

Details Evolution of the Fermi surface in phase fluctuating d-wave superconductors Evolution of the Fermi surface in phase fluctuating d-wave superconductors

2007-05-10

arxiv.org/abs/0705.1566v2

PRL 99, 247001 (2007)

Physics

Condensed Matter

Superconductivity

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Scientific paper

One of the most puzzling aspects of the high $T_c$ superconductors is the appearance of Fermi arcs in the normal state of the underdoped cuprate materials. These are loci of low energy excitations covering part of the fermi surface, that suddenly appear above $T_c$ instead of the nodal quasiparticles. Based on a semiclassical theory, we argue that partial Fermi surfaces arise naturally in a d-wave superconductor that is destroyed by thermal phase fluctuations. Specifically, we show that the electron spectral function develops a square root singularity at low frequencies for wave-vectors positioned on the bare Fermi surface. We predict a temperature dependence of the arc length that can partially account for results of recent angle resolved photo emission (ARPES) experiments.

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