Spin current as a probe of interactions in mesoscopic systems

Details Spin current as a probe of interactions in mesoscopic systems Spin current as a probe of interactions in mesoscopic systems

2004-05-25

arxiv.org/abs/cond-mat/0405579v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures. To appear in the proceedings of the XXXIXth Rencontres de Moriond (La Thuile, 2004) "Quantum information a

Scientific paper

The spin resolved current shot noise can uniquely probe the interactions in mesoscopic systems: i) in a normal-superconducting junction, the spin current noise is zero, as carried by singlets, and ii) in a single electron transistor (SET) in the sequential regime, the spin current noise is Poissonian. Coulomb interactions lead to usually repulsive, but also attractive correlations. Spin current shot noise can also be used to measure the spin relaxation time $T_1$.

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