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arXiv · cond-mat/9801166

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

N. Hayashi·T. Isoshima·M. Ichioka·K. Machida
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Abstract

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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N. Hayashi, T. Isoshima, M. Ichioka, K. Machida. 1998-01-16. Low-lying Quasiparticle Excitations around a Vortex Core in Quantum Limit. https://doi.org/10.1103/physrevlett.80.2921

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