Spin-Current Shot Noise as a Probe of Interactions in Mesoscopic Systems

O. Sauret and D. Feinberg
Phys. Rev. Lett. 92, 106601 – Published 12 March 2004

Abstract

It is shown that the spin-resolved current shot noise can probe attractive or repulsive interactions in mesoscopic systems. This is illustrated in two physical situations: (i) a normal-superconducting junction where the spin-current noise is found to be zero, and (ii) a single-electron transistor where the spin-current noise is found to be Poissonian. Repulsive interactions may also lead to weak attractive correlations (bunching of opposite spins) in conditions far from equilibrium. Spin-current shot noise can also be used to measure the spin relaxation time T1, and a setup is proposed in a quantum dot geometry.

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  • Received 15 August 2003

DOI:https://doi.org/10.1103/PhysRevLett.92.106601

©2004 American Physical Society

Authors & Affiliations

O. Sauret and D. Feinberg*

  • Laboratoire d’Etudes des Propriétés Electroniques des Solides, Centre National de la Recherche Scientifique, BP 166, 38042 Grenoble Cedex 9, France

  • *Electronic address: feinberg@grenoble.cnrs.fr

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Issue

Vol. 92, Iss. 10 — 12 March 2004

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