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Article Dans Une Revue Physical Review Letters Année : 2008

Finite frequency noise of a superconductor/ferromagnet quantum point contact

Audrey Cottet
Wolfgang Belzig
  • Fonction : Auteur

Résumé

We have calculated the finite-frequency current noise of a superconductor-ferromagnet quantum point contact (SF QPC). This signal is qualitatively affected by the spin-dependence of interfacial phase shifts (SDIPS) acquired by electrons upon reflection on the QPC. For a weakly transparent QPC, noise steps appear at frequencies or voltages determined directly by the SDIPS. These steps can occur at experimentally accessible temperatures and frequencies. Finite frequency noise is thus a promising tool to characterize the scattering properties of a SF QPC.

Dates et versions

hal-00400340 , version 1 (30-06-2009)

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Audrey Cottet, Benoît Douçot, Wolfgang Belzig. Finite frequency noise of a superconductor/ferromagnet quantum point contact. Physical Review Letters, 2008, 101, pp.257001. ⟨10.1103/PhysRevLett.101.257001⟩. ⟨hal-00400340⟩
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