Electrical probing of the spin conductance of mesoscopic cavities

Details Electrical probing of the spin conductance of mesoscopic cavities Electrical probing of the spin conductance of mesoscopic cavities

2008-08-20

arxiv.org/abs/0808.2756v2

J. Phys.: Condens. Matter 21, 155503, (2009)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 Pages, 1 figure, RevTex

Scientific paper

10.1088/0953-8984/21/15/155503

We investigate spin-dependent transport in three--terminal mesoscopic cavities with spin--orbit coupling. Focusing on the inverse spin Hall effect, we show how injecting a pure spin current or a polarized current from one terminal generates additional charge current and/or voltage across the two output terminals. This allows to extract the spin conductance of the cavity from two purely electrical measurements on the output. We use random matrix theory to show that the spin conductance of chaotic ballistic cavities fluctuates universally about zero mesoscopic average and describe experimental implementations of mesoscopic spin to charge current converters.

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