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Electronic structur...
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Bouravleuv, A. D.Russian Academy of Sciences,Saint Petersburg State University - Spsu
(författare)
Electronic structure of (In, Mn) As quantum dots buried in GaAs investigated by soft-x-ray ARPES
- Artikel/kapitelEngelska2016
Förlag, utgivningsår, omfång ...
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2016-09-15
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IOP Publishing,2016
Nummerbeteckningar
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LIBRIS-ID:oai:gup.ub.gu.se/245252
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https://gup.ub.gu.se/publication/245252URI
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https://doi.org/10.1088/0957-4484/27/42/425706DOI
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https://research.chalmers.se/publication/246366URI
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Ämneskategori:ref swepub-contenttype
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Ämneskategori:art swepub-publicationtype
Anmärkningar
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Electronic structure of a molecular beam epitaxy-grown system of (In, Mn) As quantum dots (QDs) buried in GaAs is explored with soft-x-ray angle-resolved photoelectron spectroscopy (ARPES) using photon energies around 1 keV. This technique, ideally suited for buried systems, extends the momentum-resolving capabilities of conventional ARPES with enhanced probing depth as well as elemental and chemical state specificity achieved with resonant photoexcitation. The experimental results resolve the dispersive energy bands of the GaAs substrate buried in similar to 2 nm below the surface, and the impurity states (ISs) derived from the substitutional Mn atoms in the (In, Mn) As QDs and oxidized Mn atoms distributed near the surface. An energy shift of the Mn ISs in the QDs compared to (In, Mn) As DMS is attributed to the band offset and proximity effect at the interface with the surrounding GaAs. The absence of any ISs in the vicinity of the VBM relates the electron transport in (In, Mn) As QDs to the prototype (In, Mn) As diluted magnetic semiconductor. The SX-ARPES results are supported by measurements of the shallow core levels under variation of probing depth through photon energy. X-ray absorption measurements identify significant diffusion of interstitial Mn atoms out of the QDs towards the surface, and the role of magnetic circular dichroism is to block the ferromagnetic response of the (In, Mn) As QDs. Possible routes are drawn to tune the growth procedure aiming at practical applications of the (In, Mn) As based systems.
Ämnesord och genrebeteckningar
Biuppslag (personer, institutioner, konferenser, titlar ...)
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Lev, L. L.Paul Scherrer Institut,National Research Centre "Kurchatov Institute"
(författare)
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Piamonteze, C.Paul Scherrer Institut
(författare)
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Wang, X.Paul Scherrer Institut
(författare)
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Schmitt, T.Paul Scherrer Institut
(författare)
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Khrebtov, A. I.Russian Academy of Sciences
(författare)
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Samsonenko, Y. B.Russian Academy of Sciences
(författare)
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Kanski, Janusz,1946Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU),Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)f1xjk
(författare)
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Cirlin, G. E.Saint Petersburg National Research University of Information Technologies, Mechanics and Optics University (ITMO), Russian Federation,Russian Academy of Sciences
(författare)
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Strocov, V. N.Paul Scherrer Institut
(författare)
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Russian Academy of SciencesSaint Petersburg State University - Spsu
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Nanotechnology: IOP Publishing27:420957-44841361-6528
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Till lärosätets databas
- Av författaren/redakt...
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Bouravleuv, A. D ...
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Lev, L. L.
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Piamonteze, C.
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Wang, X.
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Schmitt, T.
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Khrebtov, A. I.
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visa fler...
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Samsonenko, Y. B ...
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Kanski, Janusz, ...
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Cirlin, G. E.
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Strocov, V. N.
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visa färre...
- Om ämnet
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- NATURVETENSKAP
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NATURVETENSKAP
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och Fysik
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och Atom och molekyl ...
- Artiklar i publikationen
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Nanotechnology
- Av lärosätet
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Göteborgs universitet
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Chalmers tekniska högskola