Volume 106, Number 1, April 2014
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||02 April 2014|
Spin filtering in nanowire directional coupler
1 Departamento de Física, Universidade Federal de São Carlos - 13565-905, São Carlos, São Paulo, Brazil
2 Department of Physics and Astronomy and Nanoscale and Quantum Phenomena Institute, Ohio University Athens, OH 45701-2979, USA
3 Dahlem Center for Complex Quantum Systems and Fachbereich Physik, Freie Universität Berlin 14195 Berlin, Germany
Received: 30 January 2014
Accepted: 20 March 2014
The spin transport characteristics of a nanowire directional electronic coupler have been evaluated theoretically via a transfer matrix approach. The application of a gate field in the region of mixing allows for control of spin current through the different leads of the coupler via the Rashba spin-orbit interaction. The combination of spin-orbit interaction and applied gate voltages on different legs of the coupler give rise to a controllable modulation of the spin polarization. Both structural factors and field strength tuning lead to a rich phenomenology that could be exploited in spintronic devices.
PACS: 73.63.-b – Electronic transport in nanoscale materials and structures / 75.76.+j – Spin transport effects / 62.23.Hj – Nanowires
© EPLA, 2014
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