Comment on ``Quasiparticle Spectra around a Single Vortex in a d-wave Superconductor''

Abstract

In a recent Letter Morita, Kohmoto and Maki analyzed the structure of quasiparticle states near a single vortex in a d-wave superconductor using an approximate version of the Bogoliubov - de Gennes theory. Their principal result is the existence of a bound state within the core region at finite energy with full rotational symmetry, which they assert explains the recent scanning tunneling microscopy results on YBCO single crystals. Here we argue that the approximation used in this work is fundamentally inadequate for the description of a d-wave vortex and that the obtained circular symmetry of the local density of states is an unphysical artifact of this approximation.

1 page REVTeX, to appear in PRL

References in corpus (3)

• Mixed-State Quasiparticle Spectrum for d-wave Superconductors
• Theory of Scanning Tunneling Microscopy Probe of Impurity States in a D-Wave Superconductor
• Quasi-particle spectra around a single vortex in a d-wave superconductor

Cited by in corpus (6)

• Self-consistent electronic structure of a $d_{x^2-y^2}$ and a $d_{x^2-y^2}+i{d}_{xy}$ vortex
• Low-lying Quasiparticle Excitations around a Vortex Core in Quantum Limit
• Quasiparticle States at a d-Wave Vortex Core in High-Tc Superconductors: Induction of Local Spin Density Wave Order
• Quasiparticles of d-wave superconductors in finite magnetic fields
• Vortex state in a doped Mott insulator
• Vortex spectroscopy in the vortex glass: A real-space numerical approach