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Temperature-dependent spin-resolved electronic structure of EuO thin films

Temperature-dependent spin-resolved electronic structure of EuO thin films

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HEIDER, Tristan, Timm GERBER, Okan KÖKSAL, Markus ESCHBACH, Ewa MŁYŃCZAK, Patrick LÖMKER, Pika GOSPODARIC, Mathias GEHLMANN, Moritz PLÖTZING, Rossitza PENTCHEVA, Lukasz PLUCINSKI, Claus M. SCHNEIDER, Martina MÜLLER, 2018. Temperature-dependent spin-resolved electronic structure of EuO thin films. In: Physical Review B. American Physical Society (APS). 106, 054424. ISSN 2469-9950. eISSN 2469-9969. Available under: doi: 10.1103/PhysRevB.106.054424

@article{Heider2018Tempe-58623, title={Temperature-dependent spin-resolved electronic structure of EuO thin films}, year={2018}, doi={10.1103/PhysRevB.106.054424}, volume={106}, issn={2469-9950}, journal={Physical Review B}, author={Heider, Tristan and Gerber, Timm and Köksal, Okan and Eschbach, Markus and Młyńczak, Ewa and Lömker, Patrick and Gospodaric, Pika and Gehlmann, Mathias and Plötzing, Moritz and Pentcheva, Rossitza and Plucinski, Lukasz and Schneider, Claus M. and Müller, Martina}, note={9 pages, 6 figures Article Number: 054424} }

<rdf:RDF xmlns:dcterms="http://purl.org/dc/terms/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:bibo="http://purl.org/ontology/bibo/" xmlns:dspace="http://digital-repositories.org/ontologies/dspace/0.1.0#" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:void="http://rdfs.org/ns/void#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#" > <rdf:Description rdf:about="https://kops.uni-konstanz.de/rdf/resource/123456789/58623"> <dcterms:title>Temperature-dependent spin-resolved electronic structure of EuO thin films</dcterms:title> <dc:creator>Lömker, Patrick</dc:creator> <dc:creator>Gospodaric, Pika</dc:creator> <dc:contributor>Heider, Tristan</dc:contributor> <dc:contributor>Gospodaric, Pika</dc:contributor> <dc:contributor>Młyńczak, Ewa</dc:contributor> <dc:contributor>Plucinski, Lukasz</dc:contributor> <dc:creator>Gehlmann, Mathias</dc:creator> <dc:creator>Müller, Martina</dc:creator> <dc:creator>Köksal, Okan</dc:creator> <dc:contributor>Gehlmann, Mathias</dc:contributor> <dc:creator>Heider, Tristan</dc:creator> <foaf:homepage rdf:resource="http://localhost:8080/jspui"/> <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/> <dc:contributor>Eschbach, Markus</dc:contributor> <dc:contributor>Müller, Martina</dc:contributor> <dspace:isPartOfCollection rdf:resource="https://kops.uni-konstanz.de/rdf/resource/123456789/41"/> <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2022-09-14T10:13:54Z</dc:date> <dcterms:abstract xml:lang="eng">The electronic structure of the ferromagnetic semiconductor EuO is investigated by means of spin- and angle-resolved photoemission spectroscopy (spin-ARPES) and density functional theory. EuO exhibits unique properties of hosting both weakly-dispersive nearly fully polarized Eu $4f$ bands, as well as O $2p$ levels indirectly exchange-split by the interaction with Eu nearest neighbors. Our temperature-dependent spin-ARPES data directly demonstrates the exchange splitting in O $2p$ and its vanishing at the Curie temperature. Our calculations with a Hubbard $U$ term reveal a complex nature of the local exchange splitting on the oxygen site and in conduction bands. We discuss the mechanisms of the indirect exchange in the O 2p levels by analyzing orbital-resolved band characters in ferromagnetic and antiferromagnetic phases. The directional effects due to spin-orbit coupling are predicted theoretically to be significant in particular in the Eu 4f band manifold. The analysis of the shape of spin-resolved spectra in the Eu $4f$ spectral region reveals signatures of hybridization with O $2p$, in agreement with the theoretical predictions. We also analyze spectral changes in the spin-integrated spectra throughout the Curie temperature and demonstrate they derive from both the magnetic phase transition and effects due to sample aging, unavoidable for this highly reactive material.</dcterms:abstract> <dc:creator>Schneider, Claus M.</dc:creator> <bibo:uri rdf:resource="https://kops.uni-konstanz.de/handle/123456789/58623"/> <dc:creator>Plucinski, Lukasz</dc:creator> <dc:contributor>Köksal, Okan</dc:contributor> <dcterms:issued>2018</dcterms:issued> <dc:contributor>Schneider, Claus M.</dc:contributor> <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2022-09-14T10:13:54Z</dcterms:available> <dc:contributor>Lömker, Patrick</dc:contributor> <dc:contributor>Gerber, Timm</dc:contributor> <dc:language>eng</dc:language> <dc:creator>Młyńczak, Ewa</dc:creator> <dc:creator>Eschbach, Markus</dc:creator> <dc:contributor>Pentcheva, Rossitza</dc:contributor> <dc:creator>Gerber, Timm</dc:creator> <dc:contributor>Plötzing, Moritz</dc:contributor> <dcterms:isPartOf rdf:resource="https://kops.uni-konstanz.de/rdf/resource/123456789/41"/> <dc:creator>Pentcheva, Rossitza</dc:creator> <dc:creator>Plötzing, Moritz</dc:creator> </rdf:Description> </rdf:RDF>

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