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arXiv · 1912.10661

Dynamical spin polarization of excess quasi-particles in superconductors

Julia S. Meyer·Manuel Houzet·Yuli V. Nazarov
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Abstract

We show that the annihilation dynamics of excess quasi-particles 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 $S \simeq 10^4 \hbar$ 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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Julia S. Meyer, Manuel Houzet, Yuli V. Nazarov. 2019-12-23. Dynamical spin polarization of excess quasi-particles in superconductors. https://doi.org/10.1103/physrevlett.125.097006

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