Dynamical Spin Polarization of Excess Quasiparticles in Superconductors

Julia S. Meyer; Manuel Houzet; Yuli V. Nazarov

doi:10.1103/PhysRevLett.125.097006

Dynamical Spin Polarization of Excess Quasiparticles in Superconductors

Julia S. Meyer, Manuel Houzet, Yuli V. Nazarov

QN/Nazarov Group

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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.

Original language	English
Article number	097006
Number of pages	5
Journal	Physical Review Letters
Volume	125
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevLett.125.097006
Publication status	Published - 2020

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title = "Dynamical Spin Polarization of Excess Quasiparticles in Superconductors",

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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AU - Houzet, Manuel

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N2 - 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.

AB - 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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U2 - 10.1103/PhysRevLett.125.097006

DO - 10.1103/PhysRevLett.125.097006

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JO - Physical Review Letters

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Dynamical Spin Polarization of Excess Quasiparticles in Superconductors

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