Spin-Filter Device Based on the Rashba Effect Using a Nonmagnetic Resonant Tunneling Diode

Takaaki Koga, Junsaku Nitta, Hideaki Takayanagi, Supriyo Datta

Research output: Contribution to journalArticlepeer-review

36 Citations (Scopus)

Abstract

We propose an electronic spin-filter device that uses a nonmagnetic triple barrier resonant tunneling diode (TB-RTD). This device combines the spin-split resonant tunneling levels induced by the Rashba spin-orbit interaction and the spin blockade phenomena between two regions separated by the middle barrier in the TB-RTD. Detailed calculations using the InAlAs/InGaAs material system reveal that a splitting of a peak should be observed in the [Formula presented] curve of this device as a result of the spin-filtering effect. The filtering efficiency exceeds [Formula presented] at the peak positions in the [Formula presented] curve.

Original languageEnglish
Pages (from-to)4
Number of pages1
JournalPhysical review letters
Volume88
Issue number12
DOIs
Publication statusPublished - 2002
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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