Extinction of quasiparticle scattering interference in cuprate superconductors

TL;DR

This paper investigates the behavior of quasiparticle scattering interference in cuprate superconductors, revealing how it varies with energy and doping within a kinetic energy driven superconducting model.

Contribution

It provides a theoretical description of quasiparticle scattering interference suppression at high energies in cuprates using a kinetic energy driven superconducting framework.

Findings

Peak amplitude increases with energy at low energies

Peak position shifts with doping along nodal and antinodal directions

Quasiparticle interference diminishes at high energies

Abstract

The quasiparticle scattering interference phenomenon characterized by the peaks in the local density of states is studied within the kinetic energy driven superconducting mechanism in the presence of a single impurity. By calculation of the Fourier transformed ratio of the local density of states at opposite energy, it is shown that the quasiparticle scattering interference phenomenon can be described qualitatively by a single impurity in the kinetic energy driven homogeneous d-wave superconducting state. The amplitude of the peak increases with increasing energy at the low energy, and reaches a maximum at the intermediate energy, then diminishes to zero at the high energy. The theory also predicts that with increasing doping, the position of the peak along the nodal direction moves towards to the center of the Brillouin zone, while the position of the peak along the antinodal direction is shifted to large momentum region.