Direct measurement of the spin gaps in a gated GaAs two-dimensional electron gas

We have performed magnetotransport measurements on gated GaAs two-dimensional electron gases in which electrons are confined in a layer of the nanoscale. From the slopes of a pair of spin-split Landau levels (LLs) in the energy-magnetic field plane, we can perform direct measurements of the spin gap...

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Autores principales: Huang, Tsai-Yu, Liang, Chi-Te, Chen, Yang Fang, Simmons, Michelle Y, Kim, Gil-Ho, Ritchie, David A
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer 2013
Materias:
Nano Express
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3626693/
https://www.ncbi.nlm.nih.gov/pubmed/23522392
http://dx.doi.org/10.1186/1556-276X-8-138
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author Huang, Tsai-Yu
Liang, Chi-Te
Chen, Yang Fang
Simmons, Michelle Y
Kim, Gil-Ho
Ritchie, David A
author_facet Huang, Tsai-Yu
Liang, Chi-Te
Chen, Yang Fang
Simmons, Michelle Y
Kim, Gil-Ho
Ritchie, David A
author_sort Huang, Tsai-Yu
collection PubMed
description We have performed magnetotransport measurements on gated GaAs two-dimensional electron gases in which electrons are confined in a layer of the nanoscale. From the slopes of a pair of spin-split Landau levels (LLs) in the energy-magnetic field plane, we can perform direct measurements of the spin gap for different LLs. The measured g-factor g is greatly enhanced over its bulk value in GaAs (0.44) due to electron–electron (e-e) interactions. Our results suggest that both the spin gap and g determined from conventional activation energy studies can be very different from those obtained by direct measurements.
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spelling pubmed-36266932013-04-16 Direct measurement of the spin gaps in a gated GaAs two-dimensional electron gas Huang, Tsai-Yu Liang, Chi-Te Chen, Yang Fang Simmons, Michelle Y Kim, Gil-Ho Ritchie, David A Nanoscale Res Lett Nano Express We have performed magnetotransport measurements on gated GaAs two-dimensional electron gases in which electrons are confined in a layer of the nanoscale. From the slopes of a pair of spin-split Landau levels (LLs) in the energy-magnetic field plane, we can perform direct measurements of the spin gap for different LLs. The measured g-factor g is greatly enhanced over its bulk value in GaAs (0.44) due to electron–electron (e-e) interactions. Our results suggest that both the spin gap and g determined from conventional activation energy studies can be very different from those obtained by direct measurements. Springer 2013-03-25 /pmc/articles/PMC3626693/ /pubmed/23522392 http://dx.doi.org/10.1186/1556-276X-8-138 Text en Copyright ©2013 Huang et al.; licensee Springer. http://creativecommons.org/licenses/by/2.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Nano Express
Huang, Tsai-Yu
Liang, Chi-Te
Chen, Yang Fang
Simmons, Michelle Y
Kim, Gil-Ho
Ritchie, David A
Direct measurement of the spin gaps in a gated GaAs two-dimensional electron gas
title Direct measurement of the spin gaps in a gated GaAs two-dimensional electron gas
title_full Direct measurement of the spin gaps in a gated GaAs two-dimensional electron gas
title_fullStr Direct measurement of the spin gaps in a gated GaAs two-dimensional electron gas
title_full_unstemmed Direct measurement of the spin gaps in a gated GaAs two-dimensional electron gas
title_short Direct measurement of the spin gaps in a gated GaAs two-dimensional electron gas
title_sort direct measurement of the spin gaps in a gated gaas two-dimensional electron gas
topic Nano Express
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3626693/
https://www.ncbi.nlm.nih.gov/pubmed/23522392
http://dx.doi.org/10.1186/1556-276X-8-138
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