Dynamical Spin Polarization of Excess Quasiparticles in Superconductors

Journal article (2020)

Authors

Julia S. Meyer Université Grenoble Alpes
Manuel Houzet Université Grenoble Alpes
Y.V. Nazarov QN/Nazarov Group - AS , Kavli institute of nanoscience Delft
Research Group
QN/Nazarov Group (AS) (TU Delft)
Copyright: © 2020 Julia S. Meyer, Manuel Houzet, Y.V. Nazarov
DOI: https://doi.org/10.1103/PhysRevLett.125.097006
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Published Date

2020

Language

English

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Faculty

Applied Sciences

Department

QN/Quantum Nanoscience

Research Group

QN/Nazarov Group

Abstract

We show that the annihilation dynamics of excess quasiparticles in superconductors may result in the spontaneous formation of large spin-polarized clusters. This presents a novel scenario for spontaneous spin polarization. We estimate the relevant scales for aluminum, finding the feasibility of clusters with total spin S≃10^{4}ℏ that could be spread over microns. The fluctuation dynamics of such large spins may be detected by measuring the flux noise in a loop hosting a cluster.

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