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arXiv · 1502.02903

Electronic structure of cuprate superconductors in a full charge-spin recombination scheme

Shiping Feng·Lulin Kuang·Huaisong Zhao
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Abstract

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.

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Shiping Feng, Lulin Kuang, Huaisong Zhao. 2015-07-13. Electronic structure of cuprate superconductors in a full charge-spin recombination scheme. https://doi.org/10.1016/j.physc.2015.06.017

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