Momentum dependence of quasiparticle spectrum and Bogoliubov angle in cuprate superconductors

Abstract

The momentum dependence of the low energy quasiparticle spectrum and the related Bogoliubov angle in cuprate superconductors are studied within the kinetic energy driven superconducting mechanism. By calculation of the ratio of the low energy quasiparticle spectra at positive and negative energies, it is shown that the Bogoliubov angle increase monotonically across the Fermi crossing point. The results also show that the superconducting coherence of the low energy quasiparticle peak is well described by a simple d-wave Bardeen-Cooper-Schrieffer formalism, although the pairing mechanism is driven by the kinetic energy by exchanging spin excitations.

6 pages, 5 figures, added figure and discussions, accepted for publication in Physics Letters A

References in corpus (6)

• The magnetic nature of superconductivity in doped cuprates
• The resonant magnetic mode: a common feature of high-$T_C$ superconductors
• Electronic structure of kinetic energy driven superconductors
• Electronic structure of kinetic energy driven cuprate superconductors
• Bogoliubov angle and visualization of particle-hole mixture in superconductors
• Electronic structure of kinetic energy driven superconductors in the presence of bilayer splitting

Cited by in corpus (6)

• Magnetic field induced reduction of the low-temperature superfluid density in cuprate superconductors
• Dynamical spin response in cuprate superconductors from low-energy to high-energy
• Electromagnetic response in kinetic energy driven cuprate superconductors: Linear response approach
• Electronic Raman response in electron-doped cuprate superconductors
• Extinction of quasiparticle scattering interference in cuprate superconductors
• Pseudogap-induced asymmetric tunneling in cuprate superconductors