Ifland, Benedikt

[["dc.bibliographiccitation.artnumber","063046"],["dc.bibliographiccitation.journal","New Journal of Physics"],["dc.bibliographiccitation.volume","19"],["dc.contributor.author","Ifland, Benedikt"],["dc.contributor.author","Hoffmann, Joerg"],["dc.contributor.author","Kressdorf, Birte"],["dc.contributor.author","Roddatis, Vladimir"],["dc.contributor.author","Seibt, Michael"],["dc.contributor.author","Jooss, Christian"],["dc.date.accessioned","2018-11-07T10:22:28Z"],["dc.date.available","2018-11-07T10:22:28Z"],["dc.date.issued","2017"],["dc.description.abstract","The effect of correlation effects on photovoltaic energy conversion at manganite/titanite heterojunctions is investigated. As a model system we choose a heterostructure consisting of the small polaron absorber Pr0.66Ca0.34MnO3 (PCMO) epitaxially grown on single-crystalline Nb-doped SrTi0.998Nb0.002O3 (STNO) substrates. The high structural and chemical quality of the interfaces is proved by detailed characterization using high-resolution transmission electron microscopy (TEM) and electron energy loss spectroscopy (EELS) studies. Spectrally resolved and temperature-dependent photovoltaic measurements show pronounced contributions of both the Jahn-Teller (JT) excitations and the charge transfer (CT) transitions to the photovoltaic effect at different photon energies. A linear temperature dependence of the open-circuit voltage for an excitation in the PCMO manganite is only observed below the charge-ordering temperature, indicating that the diffusion length of the photocarrier exceeds the size of the space charge region. The photovoltaic response is compared to that of a heterojunction of lightly doped Pr0.05Ca0.95MnO3 (CMO)/STNO, where the JT transition is absent. Here, significant contributions of the CT transition to the photovoltaic effect set in below the Neel temperature. We conclude that polaronic correlations and ordering effects are essentials for photovoltaic energy conversion in manganites."],["dc.description.sponsorship","Deutsche Forschungsgemeinschaft (DFG) [SFB1073]"],["dc.description.sponsorship","Open-Access-Publikationsfonds 2017"],["dc.identifier.doi","10.1088/1367-2630/aa6c22"],["dc.identifier.isi","000404761900009"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/14592"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/42283"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","PUB_WoS_Import"],["dc.relation","SFB 1073: Kontrolle von Energiewandlung auf atomaren Skalen"],["dc.relation","SFB 1073 | Topical Area B | B02 Photonen-getriebener Energietransfer über Grenzflächen zwischen Materialien mit starken Korrelationen"],["dc.relation.issn","1367-2630"],["dc.relation.orgunit","Fakultät für Physik"],["dc.relation.orgunit","Institut für Materialphysik"],["dc.rights","CC BY 4.0"],["dc.title","Contribution of Jahn-Teller and charge transfer excitations to the photovoltaic effect of manganite/titanite heterojunctions"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","235150"],["dc.bibliographiccitation.issue","23"],["dc.bibliographiccitation.journal","Physical Review B"],["dc.bibliographiccitation.volume","95"],["dc.contributor.author","Sotoudeh, Mohsen"],["dc.contributor.author","Rajpurohit, Sangeeta"],["dc.contributor.author","Blöchl, Peter"],["dc.contributor.author","Mierwaldt, Daniel"],["dc.contributor.author","Norpoth, Jonas"],["dc.contributor.author","Roddatis, Vladimir"],["dc.contributor.author","Mildner, Stephanie"],["dc.contributor.author","Kressdorf, Birte"],["dc.contributor.author","Ifland, Benedikt"],["dc.contributor.author","Jooss, Christian"],["dc.date.accessioned","2020-12-10T18:25:03Z"],["dc.date.available","2020-12-10T18:25:03Z"],["dc.date.issued","2017"],["dc.description.abstract","The electronic structure of Pr1-xCaxMnO3 has been investigated using a combination of first-principles calculations, x-ray photoelectron spectroscopy (XPS), x-ray absorption spectroscopy (XAS), electron-energy loss spectroscopy (EELS), and optical absorption. The full range of compositions, x = 0,1/2,1, and a variety of magnetic orders have been covered. Jahn-Teller as well as Zener polaron orders are considered. The free parameters of the local hybrid density functionals used in this study have been determined by comparison with measured XPS spectra. A model Hamiltonian, valid for the entire doping range, has been extracted. A simple local-orbital picture of the electronic structure for the interpretation of experimental spectra is provided. The comparison of theoretical calculations and different experimental spectra provide a detailed and consistent picture of the electronic structure. The large variations of measured optical absorption spectra are traced back to the coexistence of magnetic orders (respectively, to the occupation of local orbitals). A consistent treatment of the Coulomb interaction indicates a partial cancellation of Coulomb parameters and supports the dominance of the electron-phonon coupling."],["dc.identifier.doi","10.1103/PhysRevB.95.235150"],["dc.identifier.eissn","2469-9969"],["dc.identifier.isi","000404468000001"],["dc.identifier.issn","2469-9950"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/75564"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","PUB_WoS_Import"],["dc.relation","SFB 1073: Kontrolle von Energiewandlung auf atomaren Skalen"],["dc.relation","SFB 1073 | Topical Area B | B02 Photonen-getriebener Energietransfer über Grenzflächen zwischen Materialien mit starken Korrelationen"],["dc.relation","SFB 1073 | Topical Area B | B03 Relaxation, Thermalisierung, Transport und Kondensation in hochangeregten Festkörpern"],["dc.relation","SFB 1073 | Topical Area C | C02 In situ hochauflösende Untersuchung des aktiven Zustands bei der photo- und elektrochemischen Wasserspaltung"],["dc.relation","SFB 1073 | Topical Area C | C03 Vom Elektronentransfer zur chemischen Energiespeicherung: ab-initio Untersuchungen korrelierter Prozesse"],["dc.relation.issn","2469-9969"],["dc.relation.issn","2469-9950"],["dc.relation.orgunit","Institut für Materialphysik"],["dc.title","Electronic structure of Pr1-xCaxMnO3"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","362"],["dc.bibliographiccitation.lastpage","363"],["dc.contributor.author","Roddatis, Vladimir"],["dc.contributor.author","Fischgrabe, Florian"],["dc.contributor.author","Merten, Sebastian"],["dc.contributor.author","Ifland, Benedikt"],["dc.contributor.author","Moschnyaga, Vasily"],["dc.contributor.author","Jooss, Christian"],["dc.date.accessioned","2021-12-08T12:29:15Z"],["dc.date.available","2021-12-08T12:29:15Z"],["dc.date.issued","2016"],["dc.identifier.doi","10.1002/9783527808465.EMC2016.6716"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/96010"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-476"],["dc.publisher","Wiley-VCH Verlag GmbH & Co. KGaA"],["dc.publisher.place","Weinheim, Germany"],["dc.relation.eisbn","9783527808465"],["dc.relation.isbn","9783527808465"],["dc.relation.ispartof","European Microscopy Congress 2016: Proceedings"],["dc.title","HR(S)TEM, EELS and Raman spectroscopy analysis of a LCMO and PCMO films"],["dc.type","book_chapter"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]