Effect of phase fluctuations on the single-particle properties of underdoped cuprates

Hyok Jon Kwon, Alan T. Dorsey

Research output: Contribution to journalArticle

Abstract

We study the effect of order parameter phase fluctuations on the single-particle properties of fermions in the underdoped cuprate superconductors using a phenomenological low-energy theory. We identify the fermion-phase field coupling as the Doppler shift of the quasiparticle spectrum induced by the fluctuating superfluid velocity and we calculate the effect of these fluctuations on the fermion self-energy. We show that the vortex pair unbinding near the superconducting transition causes a significant broadening in the fermion spectral function, producing a pseudogaplike feature. We also discuss the specific heat and show that the phase fluctuation effect is visible due to the short coherence length.

Original languageEnglish (US)
Pages (from-to)6438-6448
Number of pages11
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume59
Issue number9
DOIs
StatePublished - Jan 1 1999
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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