Single-spin polaron memory effect in quantum dots and single molecules

Dmitry A. Ryndyk, Pino D’Amico, and Klaus Richter
Phys. Rev. B 81, 115333 – Published 31 March 2010

Abstract

We propose theoretically a spin memory effect in quantum dots and single molecules with strong electron-vibron interaction and coupled to ferromagnetic leads. The controlled electrical switching between spin states is achieved due to an interplay between Franck-Condon blockade of electron transport at low voltages and spin-dependent tunneling at high voltages. Spin lifetimes, currents, and spin polarizations are calculated as a function of the bias voltage by the master-equation method. We further propose to use a third ferromagnetic tunneling contact to probe and readout the spin state.

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  • Received 25 September 2009

DOI:https://doi.org/10.1103/PhysRevB.81.115333

©2010 American Physical Society

Authors & Affiliations

Dmitry A. Ryndyk, Pino D’Amico, and Klaus Richter

  • Institute for Theoretical Physics, University of Regensburg, D-93040 Regensburg, Germany

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Issue

Vol. 81, Iss. 11 — 15 March 2010

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