2015/02/28 by Shiping Feng, Lulin Kuang, Huaisong Zhao · 1 citation
Physics and Astronomy · #cond-mat.supr-con
paper · pdf · doi:10.1016/j.physc.2015.06.017
published as Physica C 517, 5-15 (2015) · 14 pages, 7 figures. Updated references, accepted for publication in Physica C. arXiv admin note: text overlap with arXiv:1501.02420
arxiv created 2015/07/13 · arxiv updated 2015/07/21
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.