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

Article

关键词: NORMAL-STATE;    DISORDERED SUPERCONDUCTORS;    SUPERFLUID DENSITY;    PHASE FLUCTUATIONS;    PSEUDOGAP;    BI2SR2CACU2O8+DELTA;    TRANSITION;    EVOLUTION;    GAP;   

DOI  :  10.1103/PhysRevB.84.024522

来源: SCIE

【 摘 要 】

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 vortexlike phase fluctuations on the formation of Fermi arcs.

【 授权许可】

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