Two-terminal spin filter using quantum dot with spin-orbit interaction in magnetic field

Tomohiro Yokoyama, Mikio Eto

Research output: Contribution to journalConference articlepeer-review

Abstract

We propose a two-terminal spin filter utilizing a quantum dot with spin-orbit interaction and magnetic field. First we examine a quantum dot with two energy-levels, as a minimal model, and obtain an analytical expression for the spin-dependent conductance. When the spacing between the two levels is smaller than the level broadening due to the tunnel coupling to the leads, a largely spin-polarized current is generated around the current peaks of Coulomb oscillation. Next, we perform a numerical simulation using a realistic model for a quantum dot and tunnel barriers and evaluate the efficiency of our spin filter.

Original languageEnglish
Article number042075
JournalJournal of Physics: Conference Series
Volume400
Issue numberPART 4
DOIs
Publication statusPublished - 2012
Event26th International Conference on Low Temperature Physics, LT 2011 - Beijing, China
Duration: 2011 Aug 102011 Aug 17

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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