Closing the gap between spatial and spin dynamics of electrons at the metal-to-insulator transition

Show simple item record

dc.identifier.uri http://dx.doi.org/10.15488/2071
dc.identifier.uri http://www.repo.uni-hannover.de/handle/123456789/2096
dc.contributor.author Lonnemann, Jan G.
dc.contributor.author Rugeramigabo, Eddy P.
dc.contributor.author Oestreich, Michael
dc.contributor.author Hübner, Jens
dc.date.accessioned 2017-10-20T13:13:19Z
dc.date.available 2017-10-20T13:13:19Z
dc.date.issued 2017
dc.identifier.citation Lonnemann, J.G.; Rugeramigabo, E.P.; Oestreich, M.; Hübner, J.: Closing the gap between spatial and spin dynamics of electrons at the metal-to-insulator transition. In: Physical Review B 96 (2017), Nr. 4, No. 45201. DOI: https://doi.org/10.1103/PhysRevB.96.045201
dc.description.abstract We combine extensive precision measurements of the optically detected spin dynamics and magneto-transport measurements in a contiguous set of n-doped bulk GaAs structures, in order to unambiguously unravel the intriguing but complex contributions to the spin relaxation at the metal-to-insulator transition (MIT). Just below the MIT, the interplay between hopping induced loss of spin coherence and hyperfine interaction yields a maximum spin lifetime exceeding 800 ns. At slightly higher doping concentrations, however, the spin relaxation deviates from the expected Dyakonov-Perel mechanism which is consistently explained by a reduction of the effective motional narrowing close to the MIT. The reduction is attributed to the change of the dominant momentum scattering mechanism in the metallic impurity band, where scattering by local conductivity domain boundaries due to the intrinsic random distribution of donors becomes significant. Here, we fully identify and model all intricate contributions of the relevant microscopic scattering mechanisms, which allows the complete quantitative modeling of the electron spin relaxation in the entire regime from weakly interacting up to fully delocalized electrons. © 2017 American Physical Society. eng
dc.language.iso eng
dc.publisher College Park, MD : American Physical Society
dc.relation.ispartofseries Physical Review B 96 (2017), Nr. 4
dc.rights Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden.
dc.subject.ddc 530 | Physik ger
dc.title Closing the gap between spatial and spin dynamics of electrons at the metal-to-insulator transition eng
dc.type article
dc.type Text
dc.relation.issn 24699950
dc.relation.doi https://doi.org/10.1103/PhysRevB.96.045201
dc.bibliographicCitation.issue 4
dc.bibliographicCitation.volume 96
dc.bibliographicCitation.firstPage 45201
dc.description.version publishedVersion
tib.accessRights frei zug�nglich


Files in this item

This item appears in the following Collection(s):

Show simple item record

 

Search the repository


Browse

My Account

Usage Statistics