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

doi:10.1063/1.2980328

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 journal › Article › peer-review

12 Scopus citations

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 language	English (US)
Article number	066106
Journal	Journal of Applied Physics
Volume	104
Issue number	6
DOIs	https://doi.org/10.1063/1.2980328
State	Published - 2008

ASJC Scopus subject areas

General Physics and Astronomy

Access to Document

10.1063/1.2980328

Cite this

@article{fc3e71cfd52741bf84fd2cd85eee53e5,

title = "Cascade of y -shaped spin filters in InGaAs/InAs/InGaAs quantum wells",

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.",

author = "Cummings, {A. W.} and R. Akis and Ferry, {D. K.} and J. Jacob and T. Matsuyama and U. Merkt and G. Meier",

note = "Funding Information: A.W.C. acknowledges the support of the DOE Computational Science Graduate Fellowship under Grant No. DE-FG02-97ER25308. The Hamburg group acknowledges financial support by the Deutsche Forschungsgemeinschaft via the Sonderforschungsbereich 508 “Quantenmaterialen” and Graduiertenkolleg 1286 “Functional Metal-Semiconductor Hybrid Systems.”",

year = "2008",

doi = "10.1063/1.2980328",

language = "English (US)",

volume = "104",

journal = "Journal of Applied Physics",

issn = "0021-8979",

publisher = "American Institute of Physics Publising LLC",

number = "6",

}

TY - JOUR

T1 - Cascade of y -shaped spin filters in InGaAs/InAs/InGaAs quantum wells

AU - Cummings, A. W.

AU - Akis, R.

AU - Ferry, D. K.

AU - Jacob, J.

AU - Matsuyama, T.

AU - Merkt, U.

AU - Meier, G.

N1 - Funding Information: A.W.C. acknowledges the support of the DOE Computational Science Graduate Fellowship under Grant No. DE-FG02-97ER25308. The Hamburg group acknowledges financial support by the Deutsche Forschungsgemeinschaft via the Sonderforschungsbereich 508 “Quantenmaterialen” and Graduiertenkolleg 1286 “Functional Metal-Semiconductor Hybrid Systems.”

PY - 2008

Y1 - 2008

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=54749155611&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=54749155611&partnerID=8YFLogxK

U2 - 10.1063/1.2980328

DO - 10.1063/1.2980328

M3 - Article

AN - SCOPUS:54749155611

SN - 0021-8979

VL - 104

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 6

M1 - 066106

ER -

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

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this