Cascade of y -shaped spin filters in InGaAs/InAs/InGaAs quantum wells

A. W. Cummings, R. Akis, D. K. Ferry, J. Jacob, T. Matsuyama, U. Merkt, G. Meier

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

An all-electrical semiconductor device for generating and detecting spin-polarized currents with a two-stage cascade of three-terminal spin filters is discussed, where the first stage serves as the spin polarizer and the second stage serves as the detector. Transport simulations show imbalanced output conductance for higher-order subbands, independent of the spin-orbit coupling strength. However, when only the lowest subband is occupied the simulations show that the conductance asymmetry is spin-orbit dependent. Therefore, the conductance asymmetry of the lowest subband can be used to indicate spin polarization. Based on the simulations an experimental device to measure the spin-dependent conductance asymmetry is proposed.

Original languageEnglish (US)
Article number066106
JournalJournal of Applied Physics
Volume104
Issue number6
DOIs
StatePublished - 2008

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cascades
quantum wells
filters
asymmetry
orbits
simulation
polarizers
semiconductor devices
output
detectors
polarization

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Cummings, A. W., Akis, R., Ferry, D. K., Jacob, J., Matsuyama, T., Merkt, U., & Meier, G. (2008). Cascade of y -shaped spin filters in InGaAs/InAs/InGaAs quantum wells. Journal of Applied Physics, 104(6), [066106]. https://doi.org/10.1063/1.2980328

Cascade of y -shaped spin filters in InGaAs/InAs/InGaAs quantum wells. / Cummings, A. W.; Akis, R.; Ferry, D. K.; Jacob, J.; Matsuyama, T.; Merkt, U.; Meier, G.

In: Journal of Applied Physics, Vol. 104, No. 6, 066106, 2008.

Research output: Contribution to journalArticle

Cummings, AW, Akis, R, Ferry, DK, Jacob, J, Matsuyama, T, Merkt, U & Meier, G 2008, 'Cascade of y -shaped spin filters in InGaAs/InAs/InGaAs quantum wells', Journal of Applied Physics, vol. 104, no. 6, 066106. https://doi.org/10.1063/1.2980328
Cummings AW, Akis R, Ferry DK, Jacob J, Matsuyama T, Merkt U et al. Cascade of y -shaped spin filters in InGaAs/InAs/InGaAs quantum wells. Journal of Applied Physics. 2008;104(6). 066106. https://doi.org/10.1063/1.2980328
Cummings, A. W. ; Akis, R. ; Ferry, D. K. ; Jacob, J. ; Matsuyama, T. ; Merkt, U. ; Meier, G. / Cascade of y -shaped spin filters in InGaAs/InAs/InGaAs quantum wells. In: Journal of Applied Physics. 2008 ; Vol. 104, No. 6.
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