Proposal of a novel spin filter realized in a triple barrier resonant tunnel diode using Rashba spin-orbit interaction

Takaaki Koga, Junsaku Nitta, Supriyo Datta, Hideaki Takayanagi

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

A spin rectifying diode, which utilizes Rashba spin-orbit coupling, is proposed using semiconducting triple barrier structures. This spin diode makes use of spin-dependent resonant tunneling levels that are formed in the triple barrier structures. We found that, for a certain emitter-collector bias voltage, it is possible to engineer the structure in such a way that a resonant level formed within the first quantum well matches that of the second quantum well only for a selected spin state, thus realizing an electronic spin rectifier. The calculated spin polarization of the transmitted current through the device, which is defined as I-I/(I+I), is found to be higher than 99.9%.

Original languageEnglish
Pages (from-to)123-128
Number of pages6
JournalMaterials Research Society Symposium - Proceedings
Volume690
Publication statusPublished - 2002 Jan 1
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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