Single spin transport spectroscopy: Current blockade and spin decay

Kiesslich, Gerold; Schaller, Gernot; Emary, Clive; Brandes, Tobias
October 2009
Applied Physics Letters;10/12/2009, Vol. 95 Issue 15, p152104
Academic Journal
We present a theory of a single-electron transistor exchange-coupled to a localized spin. We show how to gain detailed quantitative knowledge about the attached spin such as spin size, exchange coupling strength, Landé g-factor, and spin decay time T1 by utilizing a robust blockade phenomenon of dc magnetotransport with accompanying noise enhancement. Our studies are of particular relevance to spin-resolved scanning single-electron transistor microscopy, electronic transport through nanomagnets, and the effect of hyperfine interaction on transport electrons by surrounding nuclear spins.


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