Quasiparticle Spectra around a Single Vortex in a d-Wave Superconductor

Y. Morita; M. Kohmoto; K. Maki

doi:10.1103/PhysRevLett.78.4841

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Quasiparticle Spectra around a Single Vortex in a d-Wave Superconductor

Y. Morita, M. Kohmoto, K. Maki

DOI 10.1103/PhysRevLett.78.4841 · Physical Review Letters

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Abstract

Using the Bogoliubov—de Gennes equation, we study the quasiparticle spectra around a single vortex in a d-wave superconductor. In the temperature region where the Ginzburg-Landau theory is valid, we find that the local density of states preserves a circular symmetry when the symmetry of the superconducting order parameter is pure d wave. It, however, exhibits a fourfold symmetry when the mixing of an s-wave component occurs. A peak with a large energy gap is found in the local density of states at the center of the vortex, which corresponds to the lowest bound state. Our results are consistent with a recent scanning tunneling microscopy experiment in a YBa2Cu3O7−δ monocrystal.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Nd2-xCexCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
NbSe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown