Publikation:

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

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

URI (zitierfähiger Link)
http://nbn-resolving.de/urn:nbn:de:bsz:352-124266
DOI (zitierfähiger Link)
https://doi.org/10.1103/PhysRevB.83.081305
ArXiv-ID
http://arxiv.org/abs/1008.1788v1

Internationale Patentnummer

Angaben zur Forschungsförderung

Projekt

Open Access-Veröffentlichung

Sammlungen

Physik: Publikationen
Core Facility der Universität Konstanz

Gesperrt bis

Titel in einer weiteren Sprache

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

Forschungsvorhaben

Organisationseinheiten

Zeitschriftenheft

Verknüpfte Datensätze

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