Low-lying Quasiparticle Excitations around a Vortex Core in Quantum Limit

Details Low-lying Quasiparticle Excitations around a Vortex Core in Quantum Limit Low-lying Quasiparticle Excitations around a Vortex Core in Quantum Limit

1998-01-16

arxiv.org/abs/cond-mat/9801166v1

Phys. Rev. Lett. 80, 2921 (1998)

Physics

Condensed Matter

Superconductivity

4 pages, 6 figures

Scientific paper

10.1103/PhysRevLett.80.2921

Focusing on a quantum-limit behavior, we study a single vortex in a clean s-wave type-II superconductor by self-consistently solving the Bogoliubov-de Gennes equation. The discrete energy levels of the vortex bound states in the quantum limit is discussed. The vortex core radius shrinks monotonically up to an atomic-scale length on lowering the temperature T, and the shrinkage stops to saturate at a lower T. The pair potential, supercurrent, and local density of states around the vortex exhibit Friedel-like oscillations. The local density of states has particle-hole asymmetry induced by the vortex. These are potentially observed directly by STM.

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