Kraft, R. ; Krainov, I. V. ; Gall, V. ; Dmitriev, A. P. ; Krupke, R. ; Gornyi, I. V. ; Danneau, R. (2018)
Valley Subband Splitting in Bilayer Graphene Quantum Point Contacts.
In: Physical Review Letters, 121 (25)
doi: 10.1103/PhysRevLett.121.257703
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
We report a study of one-dimensional subband splitting in a bilayer graphene quantum point contact in which quantized conductance in steps of 4e2/h is clearly defined down to the lowest subband. While our source-drain bias spectroscopy measurements reveal an unconventional confinement, we observe a full lifting of the valley degeneracy at high magnetic fields perpendicular to the bilayer graphene plane for the first two lowest subbands where confinement and Coulomb interactions are the strongest and a peculiar merging or mixing of K and K′ valleys from two nonadjacent subbands with indices (N,N+2), which are well described by our semiphenomenological model.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2018 |
| Autor(en): | Kraft, R. ; Krainov, I. V. ; Gall, V. ; Dmitriev, A. P. ; Krupke, R. ; Gornyi, I. V. ; Danneau, R. |
| Art des Eintrags: | Bibliographie |
| Titel: | Valley Subband Splitting in Bilayer Graphene Quantum Point Contacts |
| Sprache: | Englisch |
| Publikationsjahr: | 20 Dezember 2018 |
| Verlag: | American Physical Society |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Physical Review Letters |
| Jahrgang/Volume einer Zeitschrift: | 121 |
| (Heft-)Nummer: | 25 |
| DOI: | 10.1103/PhysRevLett.121.257703 |
| URL / URN: | https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.12... |
| Kurzbeschreibung (Abstract): | We report a study of one-dimensional subband splitting in a bilayer graphene quantum point contact in which quantized conductance in steps of 4e2/h is clearly defined down to the lowest subband. While our source-drain bias spectroscopy measurements reveal an unconventional confinement, we observe a full lifting of the valley degeneracy at high magnetic fields perpendicular to the bilayer graphene plane for the first two lowest subbands where confinement and Coulomb interactions are the strongest and a peculiar merging or mixing of K and K′ valleys from two nonadjacent subbands with indices (N,N+2), which are well described by our semiphenomenological model. |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Molekulare Nanostrukturen |
| Hinterlegungsdatum: | 20 Nov 2020 12:06 |
| Letzte Änderung: | 20 Nov 2020 12:06 |
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