Monte Carlo study of thermal fluctuations and Fermi-arc formation in d-wave superconductors

Details Monte Carlo study of thermal fluctuations and Fermi-arc formation in d-wave superconductors Monte Carlo study of thermal fluctuations and Fermi-arc formation in d-wave superconductors

2010-08-25

arxiv.org/abs/1008.4191v2

Phys. Rev. B 84, 024522 (2011)

Physics

Condensed Matter

Superconductivity

9 pages, 3 figures. Figures redrawn

Scientific paper

10.1103/PhysRevB.84.024522

From the perspective of thermal fluctuations, we investigate the pseudogap phenomena in underdoped high-temperature curpate superconductors. We present a local update Monte Carlo procedure based on the Green's function method to sample the fluctuating pairing field. The Chebyshev polynomial method is applied to calculate the single-particle spectral function directly and efficiently. The evolution of Fermi arcs as a function of temperature is studied by examining the spectral function at Fermi energy as well as the loss of spectral weight. Our results signify the importance of the vortex-like phase fluctuation on the formation of Fermi arcs.

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