Probing d-wave pairing correlations in the pseudogap regime of the cuprate superconductors via low-energy states near impurities

Daniel E. Sheehy, A. Adagideli, Paul M. Goldbart, Ali Yazdani

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

The issue of probing the pseudogap regime of the cuprate superconductors, specifically with regard to the existence and nature of superconducting pairing correlations of d-wave symmetry, is explored theoretically. It is shown that if the d-wave correlations believed to describe the superconducting state persist into the pseudogap regime, but with pair-potential phase fluctuations that destroy their long-range nature, then the low-energy quasiparticle states observed near extended impurities in the truly superconducting state should also persist as resonances in the pseudogap regime. The scattering of quasiparticles by these phase-fluctuations broadens what was (in the superconducting state) a sharp peak in the single-particle spectral function at low energy, as we demonstrate within the context of a simple model. This peak and its broadening are, in principle, accessible via scanning tunneling spectroscopy near extended impurities in the pseudogap regime. If so, such experiments would provide a probe of the extent to which d-wave superconducting correlations persist upon entering the pseudogap regime, thus providing a stringent diagnostic of the phase-fluctuation scenario.

Original languageEnglish (US)
Article number224518
Pages (from-to)2245181-2245188
Number of pages8
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume64
Issue number22
DOIs
StatePublished - Dec 1 2001
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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