کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1817580 | 1525695 | 2015 | 11 صفحه PDF | دانلود رایگان |
• We develope a full charge-spin recombination scheme in cuprate superconductors.
• Electron self-energy from spin excitations is a key to electronic structure.
• Underlying electron Fermi surface fulfills Luttinger’s theorem.
• Low-energy excitation in superconducting-state is Bogoliubov quasiparticle.
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.
Journal: Physica C: Superconductivity and its Applications - Volume 517, 15 October 2015, Pages 5–15