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Dynamical Spin Polarization of Excess Quasiparticles in Superconductors | Nazarov Group

Dynamical Spin Polarization of Excess Quasiparticles in Superconductors

Julia S. Meyer, Manuel Houzet, and Yuli V. Nazarov
Phys. Rev. Lett. 125, 097006 – Published 28 August 2020

Link to arxiv.org

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 a huge total spin 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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