Effect of pairing fluctuations on low-energy electronic spectra in cuprate superconductors

2010/11/30 by Sumilan Banerjee, T. V. Ramakrishnan, T V Ramakrishnan +2 · 2 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Angle-resolved photoemission spectroscopy #Condensed matter physics #Cooper pair #Cuprate #Electron #Electron pair #Electronic structure #Magnetism in coordination complexes #Pairing #Physics #Physics of Superconductivity and Magnetism #Pseudogap #Quantum mechanics #Superconductivity #Superfluidity #cond-mat.str-el #msc:82D55

paper · pdf · doi:10.1103/physrevb.84.144525

published as Phys. Rev. B 84, 144525 (2011) · 14 pages, 8 figures (to appear in Phys. Rev. B)

arxiv created 2011/10/01 · openalex publication_date 2011/10/31 · arxiv updated 2013/05/29 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We describe here a minimal theory of tight-binding electrons moving on the square planar Cu lattice of the hole-doped cuprates and mixed quantum mechanically with their own Cooper pairs. The superconductivity occurring at the transition temperature T_c is the long-range, d-wave symmetry phase coherence of these Cooper pairs. Fluctuations, necessarily associated with incipient long-range superconducting order, have a generic large-distance behavior near T_c. We calculate the spectral density of electrons coupled to such Cooper-pair fluctuations and show that features observed in angle resolved photoemission spectroscopy (ARPES) experiments on different cuprates above T_c as a function of doping and temperature emerge naturally in this description. These include ``Fermi arcs'' with temperature-dependent length and an antinodal pseudogap, which fills up linearly as the temperature increases toward the pseudogap temperature. Our results agree quantitatively with experiment. Below T_c, the effects of nonzero superfluid density and thermal fluctuations are calculated and compared successfully with some recent ARPES experiments, especially the observed bending or deviation of the superconducting gap from the canonical d-wave form.

Citations

• Angle-resolved photoemission studies of the cuprate superconductors
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• Two gaps make a high-temperature superconductor?
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• Gutzwiller–RVB theory of high-temperature superconductivity: Results from renormalized mean-field theory and variational Monte Carlo calculations

Cited by

• Electronic spectral function in the fractionalized pair density wave scenario
• Fluctuations and the Higgs Mechanism in Underdoped Cuprates