Anomalous electron spectrum and its relation to peak structure of electron scattering rate in cuprate superconductors

Abstract

The recent discovery of a direct link between the sharp peak in the electron quasiparticle scattering rate of cuprate superconductors and the well-known peak-dip-hump structure in the electron quasiparticle excitation spectrum is calling for an explanation. Within the framework of the kinetic-energy driven superconducting mechanism, the complicated line-shape in the electron quasiparticle excitation spectrum of cuprate superconductors is investigated. It is shown that the interaction between electrons by the exchange of spin excitations generates a notable peak structure in the electron quasiparticle scattering rate around the antinodal and nodal regions. However, this peak structure disappears at the hot spots, which leads to that the striking peak-dip-hump structure is developed around the antinodal and nodal regions, and vanishes at the hot spots. The theory also confirms that the sharp peak observed in the electron quasiparticle scattering rate is directly responsible for the remarkable peak-dip-hump structure in the electron quasiparticle excitation spectrum of cuprate superconductors.

10 pages, 6 figures, added references and discussions, accepted for publication in J. Low Temp. Phys

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Cited by in corpus (10)

• Autocorrelation of quasiparticle spectral intensities and its connection with quasiparticle scattering interference in cuprate superconductors
• Peak-structure in self-energy of cuprate superconductors
• Anisotropic dressing of electrons in electron-doped cuprate superconductors
• Influence of impurities on electronic structure in cuprate superconductors
• Hidden pair-density-wave order in cuprate superconductors
• Enhancement of superconductivity by electronic nematicity in cuprate superconductors
• Renormalization of electrons in bilayer cuprate superconductors
• Coexistence of $s$- and $d$-wave gaps due to pair-hopping and exchange interactions
• Unusual electronic structure in underdoped cuprate superconductors
• Impurity-Scattering Assisted Umklapp Scattering as the Origin of Low-Temperature Resistivity in the Normal-State of Cuprate Superconductors