Spin control of drifting dlectrons using local nuclear polarization in ferromagnet-semiconductor heterostructures

M. E. Nowakowski, G. D. Fuchs, S. MacK, N. Samarth, D. D. Awschalom

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

We demonstrate methods to locally control the spin rotation of moving electrons in a GaAs channel. The Larmor frequency of optically injected spins is modulated when the spins are dragged through a region of spin-polarized nuclei created at a MnAs/GaAs interface. The effective field created by the nuclei is controlled either optically or electrically using the ferromagnetic proximity polarization effect. Spin rotation is also tuned by controlling the carrier traverse time through the polarized region. We demonstrate coherent spin rotations of 5πrad during transport.

Original languageEnglish (US)
Article number137206
JournalPhysical Review Letters
Volume105
Issue number13
DOIs
StatePublished - Sep 22 2010

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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