Pair Phase Fluctuations and the Pseudogap
T. Eckl, D. J. Scalapino, E. Arrigoni, W. Hanke
Abstract
The single-particle density of states and the tunneling conductance are studied for a two-dimensional BCS-like Hamiltonian with a dx2-y2-gap and phase fluctuations. The latter are treated by a classical Monte Carlo simulation of an XY model. Comparison of our results with recent scanning tunneling spectra of Bi-based high-Tc cuprates supports the idea that the pseudogap behavior observed in these experiments can be understood as arising from phase fluctuations of a dx2-y2 pairing gap whose amplitude forms on an energy scale set by TcMF well above the actual superconducting transition.
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