Interaction effects in a chaotic graphene quantum billiard

Imre Hagymási, Péter Vancsó, András Pálinkás, Zoltán Osváth

Résultats de recherche: Contribution à un journal/une revueArticle

Résumé

We investigate the local electronic structure of a Sinai-like, quadrilateral graphene quantum billiard with zigzag and armchair edges using scanning tunneling microscopy (STM) at room temperature. It is revealed that besides the (3×3)R30 superstructure, which is caused by the intervalley scattering, its overtones also appear in the STM measurements, which are attributed to the Umklapp processes. We point out that these results can be well understood by taking into account the Coulomb interaction in the quantum billiard, accounting for both the measured density of state values and the experimentally observed topography patterns. The analysis of the level-spacing distribution substantiates the experimental findings as well. We also reveal the magnetic properties of our system which should be relevant in future graphene based electronic and spintronic applications.

langueAnglais
Numéro d'article075123
journalPhysical Review B - Condensed Matter and Materials Physics
Volume95
Numéro7
Les DOIs
étatPublié - 13 févr. 2017

Empreinte digitale

Graphite
Scanning tunneling microscopy
Graphene
scanning tunneling microscopy
graphene
Umklapp process
Magnetoelectronics
Coulomb interactions
Topography
Electronic structure
Magnetic properties
topography
spacing
interactions
Scattering
electronic structure
magnetic properties
harmonics
room temperature
scattering

Citer ceci

Hagymási, Imre ; Vancsó, Péter ; Pálinkás, András ; Osváth, Zoltán. / Interaction effects in a chaotic graphene quantum billiard. Dans: Physical Review B - Condensed Matter and Materials Physics. 2017 ; Vol 95, Numéro 7.
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Interaction effects in a chaotic graphene quantum billiard. / Hagymási, Imre; Vancsó, Péter; Pálinkás, András; Osváth, Zoltán.

Dans: Physical Review B - Condensed Matter and Materials Physics, Vol 95, Numéro 7, 075123, 13.02.2017.

Résultats de recherche: Contribution à un journal/une revueArticle

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