Moshnyaga, Vasily T.

[["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","Physical Review Applied"],["dc.bibliographiccitation.volume","14"],["dc.contributor.author","Kressdorf, B."],["dc.contributor.author","Meyer, T."],["dc.contributor.author","Belenchuk, A."],["dc.contributor.author","Shapoval, O."],["dc.contributor.author","ten Brink, M."],["dc.contributor.author","Melles, S."],["dc.contributor.author","Ross, U."],["dc.contributor.author","Hoffmann, J."],["dc.contributor.author","Moshnyaga, Vasily"],["dc.contributor.author","Seibt, Michael"],["dc.contributor.author","Blöchl, Peter"],["dc.contributor.author","Jooss, Christian"],["dc.date.accessioned","2021-04-14T08:31:35Z"],["dc.date.available","2021-04-14T08:31:35Z"],["dc.date.issued","2020"],["dc.description.abstract","Harvesting of solar energy by hot carriers from optically induced intraband transitions offers new perspectives for photovoltaic energy conversion. Clearly, mechanisms slowing down hot-carrier thermalization constitute a fundamental core of such pathways of third-generation photovoltaics. The intriguing concept of hot polarons stabilized by long-range phonon correlations in charge-ordered strongly correlated three-dimensional metal-oxide perovskite films has emerged and been demonstrated for Pr0.7Ca0.3MnO3 at low temperature. In this work, a tailored approach to extending such processes to room temperature is presented. It consists of a specially designed epitaxial growth of two-dimensional Ruddlesden-Popper Pr0.5Ca1.5MnO4 films on Nb:SrTiO3 with a charge-ordering transition at TCO ∼ 320 K. This opens the route to a different phonon-bottleneck strategy of slowing down carrier relaxation by strong coupling of electrons to cooperative lattice modes."],["dc.identifier.doi","10.1103/PhysRevApplied.14.054006"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/83645"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-399"],["dc.relation","SFB 1073: Kontrolle von Energiewandlung auf atomaren Skalen"],["dc.relation","SFB 1073 | Topical Area A | A02 Verständnis und Manipulation von Dissipationskanälen des Energietransports"],["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 Z | Z02 Hochauflösende Charakterisierung von Grenzflächen"],["dc.relation.eissn","2331-7019"],["dc.relation.orgunit","Institut für Materialphysik"],["dc.rights","CC BY 4.0"],["dc.title","Room-Temperature Hot-Polaron Photovoltaics in the Charge-Ordered State of a Layered Perovskite Oxide Heterojunction"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dc.type.version","published_version"],["dspace.entity.type","Publication"],["local.message.claim","2022-01-20T08:58:36.159+0000|||rp114901|||submit_approve|||dc_contributor_author|||None"]]

[["dc.bibliographiccitation.artnumber","2387"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Scientific Reports"],["dc.bibliographiccitation.volume","9"],["dc.contributor.author","Merten, S."],["dc.contributor.author","Shapoval, O."],["dc.contributor.author","Damaschke, B."],["dc.contributor.author","Samwer, K."],["dc.contributor.author","Moshnyaga, Vasily"],["dc.date.accessioned","2019-07-09T11:51:04Z"],["dc.date.available","2019-07-09T11:51:04Z"],["dc.date.issued","2019"],["dc.description.abstract","A long-standing issue in the physics of the colossal magnetoresistance is the role of electron-phonon coupling, which manifests itself as Jahn-Teller polarons. The origin and architecture of polarons makes it possible to study their behavior by Raman spectroscopy, which allows to analyze the polaronic behavior in an applied magnetic field. We performed magnetic-field-dependent Raman spectroscopy on thin films of (La0.6Pr0.4)0.7Ca0.3MnO3 in a range of H = 0-50 kOe and compared the obtained Raman spectra with the magnetic field behavior of the electrical resistivity. In the vicinity of the Curie temperature, TC = 197 K, the intensity of the Jahn-Teller stretching mode at 614 cm-1 and of the bending mode at 443 cm-1 was found to be suppressed and enhanced, respectively. This observed behavior has a remarkable similarity with the field and temperature dependence of the colossal magnetoresistance in (La0.6Pr0.4)0.7Ca0.3MnO3. Our work provides direct evidence that the reduction of the amount of Jahn-Teller polarons at the phase transition is the main mechanism underlying the colossal magnetoresistance."],["dc.identifier.doi","10.1038/s41598-019-39597-1"],["dc.identifier.pmid","30787387"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/16040"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/59867"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.relation","SFB 1073: Kontrolle von Energiewandlung auf atomaren Skalen"],["dc.relation","SFB 1073 | Topical Area A | A02 Verständnis und Manipulation von Dissipationskanälen des Energietransports"],["dc.relation","SFB 1073 | Topical Area B | B01 Photon-induced structural phase transition controlled by electronic correlations"],["dc.relation","SFB 1073 | Topical Area B | B04 External field control of photon energy conversion in manganites"],["dc.relation.orgunit","Fakultät für Physik"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0/"],["dc.subject.ddc","530"],["dc.title","Magnetic-Field-Induced Suppression of Jahn-Teller Phonon Bands in (La0.6Pr0.4)0.7Ca0.3MnO3: the Mechanism of Colossal Magnetoresistance shown by Raman Spectroscopy"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]