Magneto-oscillation phase anomalies in bilayer graphene with broken inversion symmetry

0392679 - FZÚ 2014 RIV US eng C - Konferenční příspěvek (zahraniční konf.)
Goncharuk, Natalya - Smrčka, Ludvík
Magneto-oscillation phase anomalies in bilayer graphene with broken inversion symmetry.
PHYSICS OF SEMICONDUCTORS: 30th International Conference on the Physics of Semiconductors. Melville: AIP, 2011 - (Ihm, J.; Cheong, H.), s. 821-822. AIP Conference Proceedings, 1399. ISBN 978-0-7354-1002-2.
[International Conference on the Physics of Semiconductors/30/ (ICPS-30). Seoul (KR), 25.07.2010-30.07.2010]
Grant CEP: GA MŠMT LC510; GA AV ČR KAN400100652
Výzkumný záměr: CEZ:AV0Z10100521
Klíčová slova: biased bilayer graphene * Landau plot * magneto-oscillation phase
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus

Our theory shows that magneto-oscillation phases in biased graphene bilayers, with broken inversion symmetry and a finite gap between the valence and conduction bands, behave anomalously. Similarly to unbiased bilayers, magneto-oscillations are only asymptotically periodic and for low magnetic fields reach the frequencies predicted quasiclassically. The frequencies are the same for K and K', but the quantum approach yields the valley-dependent gate-tunable phase corrections which give rise to two series of magneto-oscillations with the same frequency but shifted in phase.
Trvalý link: http://hdl.handle.net/11104/0221470