Low Temperature Physics: 43, 303 (2017); https://doi.org/10.1063/1.4976637
Физика Низких Температур: Том 43, Выпуск 2 (Февраль 2017), c. 368-386    ( к оглавлению , назад )

Rashba spin-splitting of single electrons and Cooper pairs

R.I. Shekhter1, O. Entin-Wohlman2,3, M. Jonson1,4, and A. Aharony2,3

1Department of Physics, University of Gothenburg, SE-412 96 Göteborg, Sweden
E-mail: mats.jonson@physics.gu.se

2Raymond and Beverly Sackler School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel

3Physics Department, Ben Gurion University, Beer Sheva 84105, Israel

4SUPA, Institute of Photonics and Quantum Sciences, Heriot-Watt University, Edinburgh, EH14 4AS, Scotland, UK

Received August 31, 2016

Аннотация

Electric weak links, the term used for those parts of an electrical circuit that provide most of the resistance against the flow of an electrical current, are important elements of many nanodevices. Quantum dots, nanowires and nano-constrictions that bridge two bulk conductors (or superconductors) are examples of such weak links. Here we consider nanostructures where the electronic spin-orbit interaction is strong in the weak link but is unmportant in the bulk conductors, and explore theoretically the role of the spin-orbit active weak link (which we call a “Rashba spin splitter”) as a source of new spin-based functionality in both normal and superconducting devices. Some recently predicted phenomena, including mechanically-controlled spin- and charge currents as well as the effect of spin polarization of superconducting Cooper pairs, are reviewed.

PACS: 72.25.Hg Electrical injection of spin polarized carriers;
PACS: 72.25.Rb Spin relaxation and scattering.

Ключевые слова: spin-orbit interaction, Rashba spin splitter, Josephson effect, electric weak link.

Published online: December 26, 2016