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Control of spin currents with double spin resonance

✍ Scribed by A. Nogaret; P. Saraiva; B. Dai; J.C. Portal

Publisher: Elsevier Science
Year: 2010
Tongue: English
Weight: 182 KB
Volume: 42
Category: Article
ISSN: 1386-9477
DOI: 10.1016/j.physe.2009.11.051

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✦ Synopsis

This paper develops a theoretical picture for coherently controlling spin currents with two resonant transitions which bridge the Zeeman gap of a two-dimensional electron system. One spin flip transition is propelled by r.f. electron oscillations in a sloping magnetic field. The second transition is induced by microwaves. When both transitions are simultaneously resonant, spin flips are inhibited by a formation of a dark state. We calculate the probability of this dark state as the system crosses resonance and show that it fits the ESR peak in the resistance of a magnetic superlattice.

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