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Experimental analysis of the spin-orbit coupling dependence on the drift velocity of a spin packet. / Kawahala, N. M.; Moraes, F. C.D.; Gusev, G. M. et al.

In: AIP Advances, Vol. 10, No. 6, 065232, 01.06.2020.

Research output: Contribution to journal › Article › peer-review

Harvard

Kawahala, NM, Moraes, FCD, Gusev, GM, Bakarov, AK & Hernandez, FGG 2020, 'Experimental analysis of the spin-orbit coupling dependence on the drift velocity of a spin packet', AIP Advances, vol. 10, no. 6, 065232. https://doi.org/10.1063/5.0016108

APA

Kawahala, N. M., Moraes, F. C. D., Gusev, G. M., Bakarov, A. K., & Hernandez, F. G. G. (2020). Experimental analysis of the spin-orbit coupling dependence on the drift velocity of a spin packet. AIP Advances, 10(6), [065232]. https://doi.org/10.1063/5.0016108

Vancouver

Kawahala NM, Moraes FCD, Gusev GM, Bakarov AK, Hernandez FGG. Experimental analysis of the spin-orbit coupling dependence on the drift velocity of a spin packet. AIP Advances. 2020 Jun 1;10(6):065232. doi: 10.1063/5.0016108

Author

Kawahala, N. M. ; Moraes, F. C.D. ; Gusev, G. M. et al. / Experimental analysis of the spin-orbit coupling dependence on the drift velocity of a spin packet. In: AIP Advances. 2020 ; Vol. 10, No. 6.

BibTeX

@article{8c5a2497c1b949009bbe5bc92f5b2426,
title = "Experimental analysis of the spin-orbit coupling dependence on the drift velocity of a spin packet",
abstract = "Spin transport was studied in a two-dimensional electron gas hosted in a wide GaAs quantum well occupying two subbands. Using space and time Kerr rotation microscopy to image drifting spin packets under an in-plane accelerating electric field, optical injection and detection of spin polarization were achieved in a pump-probe configuration. The experimental data exhibited high spin mobility and long spin lifetimes allowing us to obtain the spin-orbit fields as a function of the spin velocities. Surprisingly, above moderate electric fields of 0.4 V/cm with velocities higher than 2 μm/ns, we observed a dependence of both bulk and structure-related spin-orbit interactions on the velocity magnitude. A remarkable feature is the increase in the cubic Dresselhaus term to approximately half of the linear coupling when the velocity is raised to 10 μm/ns. In contrast, the Rashba coupling for both subbands decreases to about half of its value in the same range. These results yield new information on the application of drift models in spin-orbit fields and about limitations for the operation of spin transistors. ",
keywords = "SPINTRONICS",
author = "Kawahala, {N. M.} and Moraes, {F. C.D.} and Gusev, {G. M.} and Bakarov, {A. K.} and Hernandez, {F. G.G.}",
year = "2020",
month = jun,
day = "1",
doi = "10.1063/5.0016108",
language = "English",
volume = "10",
journal = "AIP Advances",
issn = "2158-3226",
publisher = "AMER INST PHYSICS",
number = "6",

}

RIS

TY - JOUR

T1 - Experimental analysis of the spin-orbit coupling dependence on the drift velocity of a spin packet

AU - Kawahala, N. M.

AU - Moraes, F. C.D.

AU - Gusev, G. M.

AU - Bakarov, A. K.

AU - Hernandez, F. G.G.

PY - 2020/6/1

Y1 - 2020/6/1

N2 - Spin transport was studied in a two-dimensional electron gas hosted in a wide GaAs quantum well occupying two subbands. Using space and time Kerr rotation microscopy to image drifting spin packets under an in-plane accelerating electric field, optical injection and detection of spin polarization were achieved in a pump-probe configuration. The experimental data exhibited high spin mobility and long spin lifetimes allowing us to obtain the spin-orbit fields as a function of the spin velocities. Surprisingly, above moderate electric fields of 0.4 V/cm with velocities higher than 2 μm/ns, we observed a dependence of both bulk and structure-related spin-orbit interactions on the velocity magnitude. A remarkable feature is the increase in the cubic Dresselhaus term to approximately half of the linear coupling when the velocity is raised to 10 μm/ns. In contrast, the Rashba coupling for both subbands decreases to about half of its value in the same range. These results yield new information on the application of drift models in spin-orbit fields and about limitations for the operation of spin transistors.

AB - Spin transport was studied in a two-dimensional electron gas hosted in a wide GaAs quantum well occupying two subbands. Using space and time Kerr rotation microscopy to image drifting spin packets under an in-plane accelerating electric field, optical injection and detection of spin polarization were achieved in a pump-probe configuration. The experimental data exhibited high spin mobility and long spin lifetimes allowing us to obtain the spin-orbit fields as a function of the spin velocities. Surprisingly, above moderate electric fields of 0.4 V/cm with velocities higher than 2 μm/ns, we observed a dependence of both bulk and structure-related spin-orbit interactions on the velocity magnitude. A remarkable feature is the increase in the cubic Dresselhaus term to approximately half of the linear coupling when the velocity is raised to 10 μm/ns. In contrast, the Rashba coupling for both subbands decreases to about half of its value in the same range. These results yield new information on the application of drift models in spin-orbit fields and about limitations for the operation of spin transistors.

KW - SPINTRONICS

UR - http://www.scopus.com/inward/record.url?scp=85087544716&partnerID=8YFLogxK

U2 - 10.1063/5.0016108

DO - 10.1063/5.0016108

M3 - Article

AN - SCOPUS:85087544716

VL - 10

JO - AIP Advances

JF - AIP Advances

SN - 2158-3226

IS - 6

M1 - 065232

ER -

ID: 24720615