Физика Низких Температур: Том 43, Выпуск 10 (Октябрь 2017), c. 1508-1514    ( к оглавлению , назад )

Density of states of Dirac–Landau levels in a gapped graphene monolayer under strain gradient

V.O. Shubnyi

Department of Physics, Taras Shevchenko National University of Kiev 6 Academician Glushkov Ave., Kiev 03680, Ukraine

S.G. Sharapov

Bogolyubov Institute for Theoretical Physics, National Academy of Sciences of Ukraine 14-b Metrolohichna Str., Kiev 03680, Ukraine
E-mail: sharapov@bitp.kiev.ua

Received February 20, 2017

Аннотация

We study a gapped graphene monolayer in a combination of uniform magnetic field and strain-induced uniform pseudomagnetic field. The presence of two fields completely removes the valley degeneracy. The resulting density of states shows a complicated behavior that can be tuned by adjusting the strength of the fields. We analyze how these features can be observed in the sublattice, valley and full density of states. The analytical expression for the valley DOS is derived.

PACS: 73.22.Pr Electronic structure of graphene;
PACS: 71.70.Di Landau levels.

Ключевые слова: Landau levels, graphene, strain.

Published online: August 27, 2017