Journal
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
Volume 517, Issue -, Pages 5-15Publisher
ELSEVIER
DOI: 10.1016/j.physc.2015.06.017
Keywords
Electronic structure; Electron Fermi surface; Full charge-spin recombination; Cuprate superconductor
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Funding
- Ministry of Science and Technology of China [2011CB921700, 2012CB821403]
- National Natural Science Foundation of China [11274044, 11447144]
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A long-standing unsolved problem is how a microscopic theory of superconductivity in cuprate superconductors based on the charge-spin separation can produce a large electron Fermi surface. Within the framework of the kinetic-energy driven superconducting mechanism, a full charge-spin recombination scheme is developed to fully recombine a charge carrier and a localized spin into a electron, and then is employed to study the electronic structure of cuprate superconductors in the superconducting-state. In particular, it is shown that the underlying electron Fermi surface fulfills Luttinger's theorem, while the superconducting coherence of the low-energy quasiparticle excitations is qualitatively described by the standard d-wave Bardeen-Cooper-Schrieffer formalism. The theory also shows that the observed peak-dip-hump structure in the electron spectrum and Fermi arc behavior in the underdoped regime are mainly caused by the strong energy and momentum dependence of the electron self-energy. (C) 2015 Elsevier B.V. All rights reserved.
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