Volume 90, Number 4, May 2010
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||16 June 2010|
Spin conductance control by electric means: Proposal for an all-electrical spin conductance diode
School of Computer, Jiangxi University of Traditional Chinese Medicine - Nanchang 330004, China
2 Department of Physics, Tongji University - Shanghai 200092, China
Corresponding author: email@example.com
Accepted: 5 May 2010
A scheme of an all-electrical spin conductance diode is proposed that uses a step-like quantum wire with Rashba spin-orbit interaction, connected to two leads with different width. It is shown that a very large spin conductance can be obtained when electrons transmit from the narrow lead to the wide lead, however, it vanishes or becomes very small when the transport direction is reversed. This difference is revealed to arise from the different local density of electron states of the quantum wire, which is dependent on the direction of bias. The spin conductance in the proposed structure can be generated and manipulated by purely electrical means and with strong a robustness against disorder, displaying the feasibility of this structure for a real application.
PACS: 72.25.Dc – Spin polarized transport in semiconductors / 73.21.Hb – Quantum wires / 71.70.Ej – Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect
© EPLA, 2010
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.