Complex nature of exchange splitting in oxide ferromagnets : A spin-resolved photoemission study of EuO

Heider, Tristan; Gerber, Tim; Köksal, Okan; Eschbach, Markus; Mlynczak, Ewa; Lömker, Patrick; Gospodaric, Pika; Gehlmann, Mathias; Plucinski, Lukasz; Müller, Martina

Complex nature of exchange splitting in oxide ferromagnets : A spin-resolved photoemission study of EuO

Dateien

Zu diesem Dokument gibt es keine Dateien.

Datum

2020

Autor:innen

Heider, Tristan

Gerber, Tim

Köksal, Okan

Eschbach, Markus

Mlynczak, Ewa

Lömker, Patrick

Gospodaric, Pika

Gehlmann, Mathias

Plucinski, Lukasz

Müller, Martina

et al.

ArXiv-ID

http://arxiv.org/abs/1809.00631v2

Sammlungen

Physik

Publikationstyp

Preprint

Publikationsstatus

Published

Zusammenfassung

The electronic structure of the ferromagnetic semiconductor EuO is investigated by means of spin- and angle-resolved photoemission spectroscopy and density functional theory. Our spin-resolved data reveals that, while the macroscopic magnetization of the sample vanishes at the Curie temperature TC, the experimentally-determined exchange splitting of the O 2p band persists at least up to TC if the picture of fluctuating spin-blocks is assumed. We discuss possible temperature-related spectral changes by analyzing ferromagnetic and antiferromagnetic phases, directional effect due to spin orbit coupling, as well as effects due to sample aging. Our calculations with a Hubbard U term reveal a complex nature of the local exchange splitting on the oxygen site and in conduction bands, shining a new light on the interpretation of previous optical and photoemission spectroscopic results.

Fachgebiet (DDC)

530 Physik

Zitieren

ISO 690

HEIDER, Tristan, Tim GERBER, Okan KÖKSAL, Markus ESCHBACH, Ewa MLYNCZAK, Patrick LÖMKER, Pika GOSPODARIC, Mathias GEHLMANN, Lukasz PLUCINSKI, Martina MÜLLER, 2020. Complex nature of exchange splitting in oxide ferromagnets : A spin-resolved photoemission study of EuO

BibTex

@unpublished{Heider2020Compl-53584,
  year={2020},
  title={Complex nature of exchange splitting in oxide ferromagnets : A spin-resolved photoemission study of EuO},
  author={Heider, Tristan and Gerber, Tim and Köksal, Okan and Eschbach, Markus and Mlynczak, Ewa and Lömker, Patrick and Gospodaric, Pika and Gehlmann, Mathias and Plucinski, Lukasz and Müller, Martina}
}

RDF

<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/server/rdf/resource/123456789/53584">
    <dc:creator>Gerber, Tim</dc:creator>
    <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2021-05-04T13:11:38Z</dcterms:available>
    <dc:contributor>Köksal, Okan</dc:contributor>
    <dc:contributor>Lömker, Patrick</dc:contributor>
    <dc:creator>Heider, Tristan</dc:creator>
    <dc:contributor>Gospodaric, Pika</dc:contributor>
    <dcterms:issued>2020</dcterms:issued>
    <dc:contributor>Gerber, Tim</dc:contributor>
    <dc:creator>Gehlmann, Mathias</dc:creator>
    <dcterms:title>Complex nature of exchange splitting in oxide ferromagnets : A spin-resolved photoemission study of EuO</dcterms:title>
    <dc:contributor>Heider, Tristan</dc:contributor>
    <dc:creator>Mlynczak, Ewa</dc:creator>
    <dc:creator>Köksal, Okan</dc:creator>
    <dcterms:abstract xml:lang="eng">The electronic structure of the ferromagnetic semiconductor EuO is investigated by means of spin- and angle-resolved photoemission spectroscopy and density functional theory. Our spin-resolved data reveals that, while the macroscopic magnetization of the sample vanishes at the Curie temperature TC, the experimentally-determined exchange splitting of the O 2p band persists at least up to TC if the picture of fluctuating spin-blocks is assumed. We discuss possible temperature-related spectral changes by analyzing ferromagnetic and antiferromagnetic phases, directional effect due to spin orbit coupling, as well as effects due to sample aging. Our calculations with a Hubbard U term reveal a complex nature of the local exchange splitting on the oxygen site and in conduction bands, shining a new light on the interpretation of previous optical and photoemission spectroscopic results.</dcterms:abstract>
    <dc:contributor>Müller, Martina</dc:contributor>
    <foaf:homepage rdf:resource="http://localhost:8080/"/>
    <dc:creator>Eschbach, Markus</dc:creator>
    <dc:creator>Lömker, Patrick</dc:creator>
    <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/>
    <dcterms:isPartOf rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/41"/>
    <dcterms:rights rdf:resource="https://rightsstatements.org/page/InC/1.0/"/>
    <dc:contributor>Gehlmann, Mathias</dc:contributor>
    <dc:contributor>Mlynczak, Ewa</dc:contributor>
    <dc:creator>Plucinski, Lukasz</dc:creator>
    <dc:rights>terms-of-use</dc:rights>
    <dc:contributor>Eschbach, Markus</dc:contributor>
    <dc:creator>Gospodaric, Pika</dc:creator>
    <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2021-05-04T13:11:38Z</dc:date>
    <dc:contributor>Plucinski, Lukasz</dc:contributor>
    <dspace:isPartOfCollection rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/41"/>
    <bibo:uri rdf:resource="https://kops.uni-konstanz.de/handle/123456789/53584"/>
    <dc:creator>Müller, Martina</dc:creator>
    <dc:language>eng</dc:language>
  </rdf:Description>
</rdf:RDF>

Universitätsbibliographie

Ja