The effect of phase fluctuations on the single-particle properties of the underdoped cuprates

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 pseudogap-like feature. We also discuss the specific heat and show that the phase fluctuation effect is visible due to the short coherence length.

RevTex 11 pages; 11 epsf figures included. Added and updated references

References in corpus (3)

• Phase Fluctuations and Spectral Properties of Underdoped Cuprates
• Nodal Liquid Theory of the Pseudo-Gap Phase of High-Tc Superconductors
• Evolution of Magnetic and Superconducting Fluctuations with Doping of High-Tc Superconductors

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