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How Much Phase Coherence Does a Pseudogap Need? | | Paul E. Lammert
; Daniel S. Rokhsar
; | | Date: |
9 Aug 2001 | | Subject: | Superconductivity; Strongly Correlated Electrons | cond-mat.supr-con cond-mat.str-el | | Abstract: | It has been suggested that the ``pseudogap’’ regime in cuprate superconductors, extending up to hudreds of degrees into the normal phase, reflects an incoherent d-wave pairing, with local superconducting order coherent over a finite length scale $xi$, insufficient to establish superconductivity. We calculate the single-particle spectral density in such a state from a minimal phenomenological disordered BCS model. When the phase-coherence length exceeds the Cooper pair size, a clear pseudogap appears. The pseudogap regime, however, is found only over a relatively narrow range of phase stiffnesses, hence is not expected to extend more than about 20% above $T_c$. | | Source: | arXiv, cond-mat/0108146 | | Services: | Forum | Review | PDF | Favorites | |
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