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Puzzle of non-surface related 2D electron gas in n-InN epitaxial samples

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dc.abstract.enWe have studied multicarrier contributions to the conductivity in low concentration (with Hall concentration below 1×1018 cm−3) nondoped bulk n-InN samples using Shubnikov-de Haas (SdH) in the tilted magnetic field as well as variable field resistivity tensor measurements. In some samples, the Shubnikov-de Haas effect also revealed, besides 3D electron gas, high mobility 2D electron contributions (with transport and quantum mobilities reaching the values of 5060 cm2/V s and 1800 cm2/V s, respectively, for one of our samples), which could hardly be assigned to the surface electrons as the latter are commonly believed to have mobility too low to be detected at magnetic fields not exceeding 12 T in our SdH measurements. The values of the effective masses derived from the temperature dependences of the SdH oscillation amplitudes scale with the concentration of 2D channels and are typical for low concentration InN, thus confirming that these contributions are presumably located on the InN side of some interfaces. This is one of the first experimental evaluations of the effective mass of nonsurface-related 2D electron gas in InN grown on GaN.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorKwiatkowski, Adam
dc.contributor.authorWang, Xinqiang
dc.contributor.authorKoblmüller, Gregor
dc.contributor.authorGallinat, Chad S.
dc.contributor.authorPrzybytek, Jacek
dc.contributor.authorSpeck, James S.
dc.contributor.authorBaj, Michał
dc.contributor.authorDmowski, Lesław H.
dc.date.accessioned2024-01-25T18:42:47Z
dc.date.available2024-01-25T18:42:47Z
dc.date.issued2019
dc.description.financeNie dotyczy
dc.description.number4
dc.description.volume126
dc.identifier.doi10.1063/1.5095523
dc.identifier.issn0021-8979
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/117624
dc.identifier.weblinkhttp://aip.scitation.org/doi/pdf/10.1063/1.5095523
dc.languageeng
dc.pbn.affiliationphysical sciences
dc.relation.ispartofJournal of Applied Physics
dc.relation.pages45705
dc.rightsClosedAccess
dc.sciencecloudnosend
dc.titlePuzzle of non-surface related 2D electron gas in n-InN epitaxial samples
dc.typeJournalArticle
dspace.entity.typePublication