Impurity-induced Local Density of States in a D-wave Superconductor Carrying a Supercurrent
arXiv:cond-mat/0410523 · doi:10.1103/PhysRevB.71.064521
Abstract
The local density of states (LDOS) and its Fourier component induced by a unitary impurity in a supercurrent-carrying d-wave superconductor are investigated. Both of these quantities possess a reflection symmetry about the line passing through the impurity site and along the supercurrent if it is applied along the antinodal or nodal direction. With increasing supercurrent, both the coherence and resonant peaks in the LDOS are suppressed and slightly broadened. Under a supercurrent along the antinodal direction, the coherence peaks split into double peaks. The modulation wavevectors associated with elastic scatterings of quasiparticles by the defect from one constant-energy piece of the Fermi surface to another are displayed as bright or dark spots in the Fourier space of the LDOS image, and they may be suppressed or enhanced, and shifted depending on the applied current and the bias voltage.
arXiv comment5 pages, 6 figures
References in corpus (14)
- Imaging the Effects of Individual Zinc Impurity Atoms on Superconductivity in Bi2Sr2CaCu2O8+delta
- Imaging Quasiparticle Interference in Bi2Sr2CaCu2O8+d
- Quasiparticle Scattering Interference in High Temperature Superconductors
- Phenomenological Models for the Gap Anisotropy of Bi-2212 as Measured by ARPES
- Impurity-Induced Virtual Bound States in d-Wave Superconductors
- Theory of Scanning Tunneling Microscopy Probe of Impurity States in a D-Wave Superconductor
- Impurity states and interlayer tunneling in high temperature superconductors
- Power spectrum of many impurities in a d-wave superconductor
- Effect of unitary impurities in non-STM-types of tunneling in high-T_c superconductors
- Density of States of a d-wave Superconductor in the Presence of Strong Impurity Scatterers: a Non Perturbative Result
- Supercurrent in Nodal Superconductors
- Conductance Characteristics between a Normal Metal and a Superconductor Carrying a Supercurrent
- The Energy-dependent Checkerboard Patterns in Cuprate Superconductors
- Impurity resonances in the mixed state of high-Tc superconductors