Inhomogeneity Induces Resonance Coherence Peaks in Superconducting BSCCO

Details Inhomogeneity Induces Resonance Coherence Peaks in Superconducting BSCCO Inhomogeneity Induces Resonance Coherence Peaks in Superconducting BSCCO

2005-08-10

arxiv.org/abs/cond-mat/0508253v1

PRL vol 96, 017007 (2006)

Physics

Condensed Matter

Superconductivity

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.96.017007

In this paper we analyze, using scanning tunneling spectroscopy, the density of electronic states in nearly optimally doped BSCCO in zero field. Focusing on the superconducting gap, we find patches of what appear to be two different phases in a background of some average gap, one with a relatively small gap and sharp large coherence peaks and one characterized by a large gap with broad weak coherence peaks. We compare these spectra with calculations of the local density of states for a simple phenomenological model in which a 2 xi_0 * 2 xi_0 patch with an enhanced or supressed d-wave gap amplitude is embedded in a region with a uniform average d-wave gap.

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