Publikation:

Multiband đ‘˜Â·đ‘ theory for hexagonal germanium

Lade...
Vorschaubild

Dateien

Zu diesem Dokument gibt es keine Dateien.

Datum

2024

Herausgeber:innen

Kontakt

ISSN der Zeitschrift

Electronic ISSN

ISBN

Bibliografische Daten

Verlag

Schriftenreihe

Auflagebezeichnung

URI (zitierfÀhiger Link)
ArXiv-ID

Internationale Patentnummer

Angaben zur Forschungsförderung

Projekt

Open Access-Veröffentlichung
Core Facility der UniversitÀt Konstanz

Gesperrt bis

Titel in einer weiteren Sprache

Publikationstyp
Zeitschriftenartikel
Publikationsstatus
Published

Erschienen in

Physical Review B. American Physical Society (APS). 2024, 109(20), 205202. ISSN 2469-9950. eISSN 2469-9969. VerfĂŒgbar unter: doi: 10.1103/physrevb.109.205202

Zusammenfassung

The direct bandgap found in hexagonal germanium and some of its alloys with silicon allows for an optically active material within the group-IV semiconductor family with various potential technological applications. However, there remain some unanswered questions regarding several aspects of the band structure, including the strength of the electric dipole transitions at the center of the Brillouin zone. Using the đ€Â·đ© method near the Γ point, including 10 bands, and taking spin-orbit coupling into account, we obtain a self-consistent model that produces the correct band curvatures, with previously unknown inverse effective mass parameters, to describe 2H-Ge via fitting to ab initio data and to calculate effective masses for electrons and holes. To understand the weak dipole coupling between the lowest conduction band and the top valance band, we start from a spinless 12-band model and show that when adding spin-orbit coupling, the lowest conduction band hybridizes with a higher-lying conduction band, which cannot be explained by the spinful 10-band model. With the help of Löwdin's partitioning, we derive the effective low-energy Hamiltonian for the conduction bands for the possible spin dynamics and nanostructure studies and in a similar manner, we give the best-fit parameters for the valance-band-only model that can be used in the transport studies. Using the self-consistent 10-band model, we include the effects of a magnetic field and predict the electron and hole 𝑔 factor of the conduction and valance bands. Finally, we give an ellipticity analysis of the found effective mass tensor, to ensure the uniqueness of the solutions for its application to heterostructures.

Zusammenfassung in einer weiteren Sprache

Fachgebiet (DDC)
530 Physik

Schlagwörter

Konferenz

Rezension
undefined / . - undefined, undefined

Forschungsvorhaben

Organisationseinheiten

Zeitschriftenheft

Zugehörige DatensÀtze in KOPS

Zitieren

ISO 690PULCU, Yetkin, JĂĄnos KOLTAI, Andor KORMÁNYOS, Guido BURKARD, 2024. Multiband đ‘˜Â·đ‘ theory for hexagonal germanium. In: Physical Review B. American Physical Society (APS). 2024, 109(20), 205202. ISSN 2469-9950. eISSN 2469-9969. VerfĂŒgbar unter: doi: 10.1103/physrevb.109.205202
BibTex
@article{Pulcu2024Multi-70156,
  year={2024},
  doi={10.1103/physrevb.109.205202},
  title={Multiband đ‘˜Â·đ‘ theory for hexagonal germanium},
  number={20},
  volume={109},
  issn={2469-9950},
  journal={Physical Review B},
  author={Pulcu, Yetkin and Koltai, JĂĄnos and KormĂĄnyos, Andor and Burkard, Guido},
  note={Article Number: 205202}
}
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/123456789/70156">
    <dc:contributor>Koltai, JĂĄnos</dc:contributor>
    <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/>
    <dc:creator>Pulcu, Yetkin</dc:creator>
    <dcterms:abstract>The direct bandgap found in hexagonal germanium and some of its alloys with silicon allows for an optically active material within the group-IV semiconductor family with various potential technological applications. However, there remain some unanswered questions regarding several aspects of the band structure, including the strength of the electric dipole transitions at the center of the Brillouin zone. Using the đ€Â·đ© method near the Γ point, including 10 bands, and taking spin-orbit coupling into account, we obtain a self-consistent model that produces the correct band curvatures, with previously unknown inverse effective mass parameters, to describe 2H-Ge via fitting to ab initio data and to calculate effective masses for electrons and holes. To understand the weak dipole coupling between the lowest conduction band and the top valance band, we start from a spinless 12-band model and show that when adding spin-orbit coupling, the lowest conduction band hybridizes with a higher-lying conduction band, which cannot be explained by the spinful 10-band model. With the help of Löwdin's partitioning, we derive the effective low-energy Hamiltonian for the conduction bands for the possible spin dynamics and nanostructure studies and in a similar manner, we give the best-fit parameters for the valance-band-only model that can be used in the transport studies. Using the self-consistent 10-band model, we include the effects of a magnetic field and predict the electron and hole 𝑔 factor of the conduction and valance bands. Finally, we give an ellipticity analysis of the found effective mass tensor, to ensure the uniqueness of the solutions for its application to heterostructures.</dcterms:abstract>
    <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2024-06-19T06:54:07Z</dcterms:available>
    <dc:creator>Koltai, JĂĄnos</dc:creator>
    <dc:creator>KormĂĄnyos, Andor</dc:creator>
    <dc:creator>Burkard, Guido</dc:creator>
    <foaf:homepage rdf:resource="http://localhost:8080/"/>
    <dspace:isPartOfCollection rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/41"/>
    <dcterms:issued>2024</dcterms:issued>
    <dc:contributor>Burkard, Guido</dc:contributor>
    <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2024-06-19T06:54:07Z</dc:date>
    <bibo:uri rdf:resource="https://kops.uni-konstanz.de/handle/123456789/70156"/>
    <dc:contributor>KormĂĄnyos, Andor</dc:contributor>
    <dc:language>eng</dc:language>
    <dcterms:title>Multiband đ‘˜Â·đ‘ theory for hexagonal germanium</dcterms:title>
    <dcterms:isPartOf rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/41"/>
    <dc:contributor>Pulcu, Yetkin</dc:contributor>
  </rdf:Description>
</rdf:RDF>

Interner Vermerk

xmlui.Submission.submit.DescribeStep.inputForms.label.kops_note_fromSubmitter

Kontakt
URL der Originalveröffentl.

PrĂŒfdatum der URL

PrĂŒfungsdatum der Dissertation

Finanzierungsart

Kommentar zur Publikation

Allianzlizenz
Corresponding Authors der Uni Konstanz vorhanden
Internationale Co-Autor:innen
UniversitÀtsbibliographie
Ja
Begutachtet
Ja
Diese Publikation teilen