Resonant-tunneling-based spin ratchets

URN to cite this document:: urn:nbn:de:bvb:355-epub-79720
DOI to cite this document:: 10.5283/epub.7972

Scheid, Matthias ; Lassl, Andreas ; Richter, Klaus

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Date of publication of this fulltext: 05 Aug 2009 13:58

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Abstract

We outline a generic ratchet mechanism for creating directed spin-polarized currents in ac-driven double-well or double-dot structures by employing resonant spin transfer through the system engineered by local external magnetic fields. We show its applicability to semiconductor nanostructures by considering coherent transport through two coupled lateral quantum dots, where the energy levels of ...