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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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| Dokumentenart | Artikel | ||||
| Titel eines Journals oder einer Zeitschrift | Science Advances | ||||
| Verlag: | Science | ||||
|---|---|---|---|---|---|
| Band: | 10 | ||||
| Nummer des Zeitschriftenheftes oder des Kapitels: | 44 | ||||
| Seitenbereich: | eadp7833 | ||||
| Datum | 1 November 2024 | ||||
| Institutionen | Physik > Institut für Experimentelle und Angewandte Physik > Arbeitsgruppe Jascha Repp | ||||
| Identifikationsnummer |
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| Dewey-Dezimal-Klassifikation | 500 Naturwissenschaften und Mathematik > 530 Physik 500 Naturwissenschaften und Mathematik > 540 Chemie | ||||
| Status | Veröffentlicht | ||||
| Begutachtet | Ja, diese Version wurde begutachtet | ||||
| An der Universität Regensburg entstanden | Zum Teil | ||||
| URN der UB Regensburg | urn:nbn:de:bvb:355-epub-594954 | ||||
| Dokumenten-ID | 59495 |
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