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arXiv · 1301.6445

Impurity scattering effect on the zero-energy peak of the local density of states in a multi-quantum vortex core

Takashi Yamane·Yuki Nagai·K. Tanaka·Nobuhiko Hayashi
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Abstract

We theoretically study a non-magnetic impurity effect on the vortex bound states of a multi-quantum vortex. The zero-energy peak of the local density of states is investigated for vortex cores with the winding numbers 2 and 4 within the framework of the quasiclassical theory of superconductivity. We find that the zero-energy peaks, which appear away from the vortex center in the clean limit, move towards the vortex center with increasing the impurity scattering rate, resolving a contradiction between an experimental result and previous theoretical predictions.

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Takashi Yamane, Yuki Nagai, K. Tanaka, Nobuhiko Hayashi. 2013-01-28. Impurity scattering effect on the zero-energy peak of the local density of states in a multi-quantum vortex core. https://doi.org/10.1016/j.physc.2013.04.046

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