Landau levels and Shubnikov-de Haas oscillations in monolayer transition metal dichalcogenide semiconductors

Kormányos, Andor; Rakyta, Péter; Burkard, Guido

Landau levels and Shubnikov-de Haas oscillations in monolayer transition metal dichalcogenide semiconductors

Dateien

Kormanyos_0-311177.pdfGröße: 1.2 MBDownloads: 232

Datum

2015

Autor:innen

Kormányos, Andor

Rakyta, Péter

Burkard, Guido

Open Access-Veröffentlichung

Open Access Gold

Sammlungen

Physik

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

New Journal of Physics. 2015, 17(10), 103006. eISSN 1367-2630. Available under: doi: 10.1088/1367-2630/17/10/103006

Zusammenfassung

We study the Landau level (LL) spectrum using a multi-band ${\bf{k}}\cdot {\bf{p}}$ theory in monolayer transition metal dichalcogenide semiconductors. We find that in a wide magnetic field range the LL can be characterized by a harmonic oscillator spectrum and a linear-in-magnetic field term which describes the valley degeneracy breaking. The effect of the non-parabolicity of the band-dispersion on the LL spectrum is also discussed. Motivated by recent magnetotransport experiments, we use the self-consistent Born approximation and the Kubo formalism to calculate the Shubnikov–de Haas oscillations of the longitudinal conductivity. We investigate how the doping level, the spin-splitting of the bands and the broken valley degeneracy of the LLs affect the magnetoconductance oscillations. We consider monolayer MoS2 and WSe2 as concrete examples and compare the results of numerical calculations and an analytical formula which is valid in the semiclassical regime. Finally, we briefly analyze the recent experimental results (Cui et al 2015 Nat. Nanotechnol. 10 534) using the theoretical approach we have developed.

Fachgebiet (DDC)

530 Physik

Zitieren

ISO 690

KORMÁNYOS, Andor, Péter RAKYTA, Guido BURKARD, 2015. Landau levels and Shubnikov-de Haas oscillations in monolayer transition metal dichalcogenide semiconductors. In: New Journal of Physics. 2015, 17(10), 103006. eISSN 1367-2630. Available under: doi: 10.1088/1367-2630/17/10/103006

BibTex

@article{Kormanyos2015Landa-32319,
  year={2015},
  doi={10.1088/1367-2630/17/10/103006},
  title={Landau levels and Shubnikov-de Haas oscillations in monolayer transition metal dichalcogenide semiconductors},
  number={10},
  volume={17},
  journal={New Journal of Physics},
  author={Kormányos, Andor and Rakyta, Péter and Burkard, Guido},
  note={Article Number: 103006}
}

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/123456789/32319">
    <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/>
    <dc:contributor>Kormányos, Andor</dc:contributor>
    <dc:creator>Burkard, Guido</dc:creator>
    <dcterms:abstract xml:lang="eng">We study the Landau level (LL) spectrum using a multi-band ${\bf{k}}\cdot {\bf{p}}$ theory in monolayer transition metal dichalcogenide semiconductors. We find that in a wide magnetic field range the LL can be characterized by a harmonic oscillator spectrum and a linear-in-magnetic field term which describes the valley degeneracy breaking. The effect of the non-parabolicity of the band-dispersion on the LL spectrum is also discussed. Motivated by recent magnetotransport experiments, we use the self-consistent Born approximation and the Kubo formalism to calculate the Shubnikov–de Haas oscillations of the longitudinal conductivity. We investigate how the doping level, the spin-splitting of the bands and the broken valley degeneracy of the LLs affect the magnetoconductance oscillations. We consider monolayer MoS2 and WSe2 as concrete examples and compare the results of numerical calculations and an analytical formula which is valid in the semiclassical regime. Finally, we briefly analyze the recent experimental results (Cui et al 2015 Nat. Nanotechnol. 10 534) using the theoretical approach we have developed.</dcterms:abstract>
    <dspace:hasBitstream rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/32319/1/Kormanyos_0-311177.pdf"/>
    <dc:contributor>Rakyta, Péter</dc:contributor>
    <dc:rights>Attribution 3.0 Unported</dc:rights>
    <dc:creator>Rakyta, Péter</dc:creator>
    <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2015-12-03T10:16:01Z</dc:date>
    <dc:language>eng</dc:language>
    <dc:contributor>Burkard, Guido</dc:contributor>
    <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2015-12-03T10:16:01Z</dcterms:available>
    <dcterms:hasPart rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/32319/1/Kormanyos_0-311177.pdf"/>
    <dcterms:rights rdf:resource="http://creativecommons.org/licenses/by/3.0/"/>
    <dcterms:title>Landau levels and Shubnikov-de Haas oscillations in monolayer transition metal dichalcogenide semiconductors</dcterms:title>
    <bibo:uri rdf:resource="https://kops.uni-konstanz.de/handle/123456789/32319"/>
    <dcterms:issued>2015</dcterms:issued>
    <dc:creator>Kormányos, Andor</dc:creator>
    <dspace:isPartOfCollection rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/41"/>
    <foaf:homepage rdf:resource="http://localhost:8080/"/>
    <dcterms:isPartOf rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/41"/>
  </rdf:Description>
</rdf:RDF>

Universitätsbibliographie

Ja