Spin polarization of (Ga,Mn)As measured by Andreev Spectroscopy : The role of spin-active scattering

Lade...
Vorschaubild
Dateien
Zu diesem Dokument gibt es keine Dateien.
Datum
2011
Autor:innen
Piano, Samanta
Grein, Roland
Mellor, Christopher J.
Výborný, Karel
Campion, Richard
Wang, M.
Gallagher, Bryan
Herausgeber:innen
Kontakt
ISSN der Zeitschrift
Electronic ISSN
ISBN
Bibliografische Daten
Verlag
Schriftenreihe
Auflagebezeichnung
Internationale Patentnummer
Angaben zur Forschungsförderung
Projekt
Open Access-Veröffentlichung
Sammlungen
Core Facility der Universität Konstanz
Gesperrt bis
Titel in einer weiteren Sprache
Forschungsvorhaben
Organisationseinheiten
Zeitschriftenheft
Publikationstyp
Preprint
Publikationsstatus
Published
Erschienen in
Physical Review B. 2011, 83(8). ISSN 1098-0121. Available under: doi: 10.1103/PhysRevB.83.081305
Zusammenfassung

We investigate the spin-polarization of the ferromagnetic semiconductor (Ga,Mn)As by Andreev point contact spectroscopy. We analyze the conductance spectra with the theoretical model of [R. Grein et al., Phys. Rev. B 81, 094508 (2010)], which accounts for momentum- and spin-dependent scattering at the interface. We show that this allows for fitting the data without resorting to an effective temperature or statistical distribution of superconducting gaps, as it is the case for the spin-dependent version of the standard Blonder-Tinkham-Klapwijk (BTK) model. We find a transport polarization P_C of about 56% at the Fermi level and comparing it to the k.p kinetic-exchange model of (Ga,Mn)As, we achieve a considerably better agreement than estimates inferred from the spin-dependent BTK model which are significantly higher. The temperature dependence of the conductance spectra is fully analyzed.

Zusammenfassung in einer weiteren Sprache
Fachgebiet (DDC)
530 Physik
Schlagwörter
Konferenz
Rezension
undefined / . - undefined, undefined
Zitieren
ISO 690PIANO, Samanta, Roland GREIN, Christopher J. MELLOR, Karel VÝBORNÝ, Richard CAMPION, M. WANG, Matthias ESCHRIG, Bryan GALLAGHER, 2011. Spin polarization of (Ga,Mn)As measured by Andreev Spectroscopy : The role of spin-active scattering. In: Physical Review B. 2011, 83(8). ISSN 1098-0121. Available under: doi: 10.1103/PhysRevB.83.081305
BibTex
@unpublished{Piano2011polar-12426,
  year={2011},
  doi={10.1103/PhysRevB.83.081305},
  title={Spin polarization of (Ga,Mn)As measured by Andreev Spectroscopy : The role of spin-active scattering},
  author={Piano, Samanta and Grein, Roland and Mellor, Christopher J. and Výborný, Karel and Campion, Richard and Wang, M. and Eschrig, Matthias and Gallagher, Bryan},
  note={Also publ. in: Physical Review B ; 83 (2011), 8. - 081305}
}
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/123456789/12426">
    <dc:creator>Eschrig, Matthias</dc:creator>
    <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/>
    <dc:contributor>Eschrig, Matthias</dc:contributor>
    <dc:contributor>Výborný, Karel</dc:contributor>
    <dc:contributor>Piano, Samanta</dc:contributor>
    <dc:creator>Piano, Samanta</dc:creator>
    <dc:creator>Výborný, Karel</dc:creator>
    <dcterms:isPartOf rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/41"/>
    <dc:creator>Wang, M.</dc:creator>
    <dc:contributor>Mellor, Christopher J.</dc:contributor>
    <dc:rights>terms-of-use</dc:rights>
    <dcterms:abstract xml:lang="eng">We investigate the spin-polarization of the ferromagnetic semiconductor (Ga,Mn)As by Andreev point contact spectroscopy. We analyze the conductance spectra with the theoretical model of [R. Grein et al., Phys. Rev. B 81, 094508 (2010)], which accounts for momentum- and spin-dependent scattering at the interface. We show that this allows for fitting the data without resorting to an effective temperature or statistical distribution of superconducting gaps, as it is the case for the spin-dependent version of the standard Blonder-Tinkham-Klapwijk (BTK) model. We find a transport polarization P_C of about 56% at the Fermi level and comparing it to the k.p kinetic-exchange model of (Ga,Mn)As, we achieve a considerably better agreement than estimates inferred from the spin-dependent BTK model which are significantly higher. The temperature dependence of the conductance spectra is fully analyzed.</dcterms:abstract>
    <dc:contributor>Gallagher, Bryan</dc:contributor>
    <dspace:isPartOfCollection rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/41"/>
    <dcterms:title>Spin polarization of (Ga,Mn)As measured by Andreev Spectroscopy : The role of spin-active scattering</dcterms:title>
    <dc:creator>Gallagher, Bryan</dc:creator>
    <dcterms:rights rdf:resource="https://rightsstatements.org/page/InC/1.0/"/>
    <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-04-11T14:57:32Z</dc:date>
    <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-04-11T14:57:32Z</dcterms:available>
    <dcterms:bibliographicCitation>First publ. in: arXiv:1008.1788v1</dcterms:bibliographicCitation>
    <dc:contributor>Campion, Richard</dc:contributor>
    <foaf:homepage rdf:resource="http://localhost:8080/"/>
    <dcterms:issued>2011</dcterms:issued>
    <dc:contributor>Wang, M.</dc:contributor>
    <dc:creator>Campion, Richard</dc:creator>
    <dc:language>eng</dc:language>
    <dc:creator>Grein, Roland</dc:creator>
    <dc:creator>Mellor, Christopher J.</dc:creator>
    <bibo:uri rdf:resource="http://kops.uni-konstanz.de/handle/123456789/12426"/>
    <dc:contributor>Grein, Roland</dc:contributor>
  </rdf:Description>
</rdf:RDF>
Interner Vermerk
xmlui.Submission.submit.DescribeStep.inputForms.label.kops_note_fromSubmitter
Kontakt
URL der Originalveröffentl.
Prüfdatum der URL
Prüfungsdatum der Dissertation
Finanzierungsart
Kommentar zur Publikation
Also publ. in: Physical Review B ; 83 (2011), 8. - 081305
Allianzlizenz
Corresponding Authors der Uni Konstanz vorhanden
Internationale Co-Autor:innen
Universitätsbibliographie
Nein
Begutachtet
Diese Publikation teilen