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Redondo, Jesus ; Reticcioli, Michele ; Gabriel, Vit ; Wrana, Dominik ; Ellinger, Florian ; Riva, Michele ; Franceschi, Giada ; Rheinfrank, Erik ; Sokolović, Igor ; Jakub, Zdenek ; Kraushofer, Florian ; Alexander, Aji ; Belas, Eduard ; Patera, Laerte L. ; Repp, Jascha ; Schmid, Michael ; Diebold, Ulrike ; Parkinson, Gareth S. ; Franchini, Cesare ; Kocan, Pavel ; Setvin, Martin

Real-space investigation of polarons in hematite Fe 2 O 3

Redondo, Jesus, Reticcioli, Michele, Gabriel, Vit, Wrana, Dominik, Ellinger, Florian, Riva, Michele, Franceschi, Giada, Rheinfrank, Erik, Sokolović, Igor, Jakub, Zdenek, Kraushofer, Florian, Alexander, Aji, Belas, Eduard, Patera, Laerte L. , Repp, Jascha , Schmid, Michael, Diebold, Ulrike, Parkinson, Gareth S., Franchini, Cesare, Kocan, Pavel und Setvin, Martin (2024) Real-space investigation of polarons in hematite Fe 2 O 3. Science Advances 10 (44), eadp7833.

Veröffentlichungsdatum dieses Volltextes: 06 Nov 2024 11:36
Artikel
DOI zum Zitieren dieses Dokuments: 10.5283/epub.59495


Zusammenfassung

In polarizable materials, electronic charge carriers interact with the surrounding ions, leading to quasiparticle behavior. The resulting polarons play a central role in many materials properties including electrical transport, interaction with light, surface reactivity, and magnetoresistance, and polarons are typically investigated indirectly through these macroscopic characteristics. Here, ...

In polarizable materials, electronic charge carriers interact with the surrounding ions, leading to quasiparticle behavior. The resulting polarons play a central role in many materials properties including electrical transport, interaction with light, surface reactivity, and magnetoresistance, and polarons are typically investigated indirectly through these macroscopic characteristics. Here, noncontact atomic force microscopy (nc-AFM) is used to directly image polarons in Fe2O3 at the single quasiparticle limit. A combination of Kelvin probe force microscopy (KPFM) and kinetic Monte Carlo (KMC) simulations shows that the mobility of electron polarons can be markedly increased by Ti doping. Density functional theory (DFT) calculations indicate that a transition from polaronic to metastable free-carrier states can play a key role in migration of electron polarons. In contrast, hole polarons are significantly less mobile, and their hopping is hampered further by trapping centers.



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Details

DokumentenartArtikel
Titel eines Journals oder einer ZeitschriftScience Advances
Verlag:Science
Band:10
Nummer des Zeitschriftenheftes oder des Kapitels:44
Seitenbereich:eadp7833
Datum1 November 2024
InstitutionenPhysik > Institut für Experimentelle und Angewandte Physik > Arbeitsgruppe Jascha Repp
Identifikationsnummer
WertTyp
10.1126/sciadv.adp7833DOI
Dewey-Dezimal-Klassifikation500 Naturwissenschaften und Mathematik > 530 Physik
500 Naturwissenschaften und Mathematik > 540 Chemie
StatusVeröffentlicht
BegutachtetJa, diese Version wurde begutachtet
An der Universität Regensburg entstandenZum Teil
URN der UB Regensburgurn:nbn:de:bvb:355-epub-594954
Dokumenten-ID59495

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