IFEG   20353
INSTITUTO DE FISICA ENRIQUE GAVIOLA
Unidad Ejecutora - UE
artículos
Título:
Radiation effects on the electronic structure of bilayer graphene
Autor/es:
E. SUÁREZ MORELL; L. E. F. FOA TORRES
Revista:
PHYSICAL REVIEW B
Editorial:
AMER PHYSICAL SOC
Referencias:
Lugar: New York; Año: 2012 vol. 86 p. 125449 - 125449
ISSN:
1098-0121
Resumen:
We report on the
effects of laser illumination on the electronic properties of bilayer
graphene. By using Floquet theory combined with Green's functions, we
unveil the appearance of laser-induced gaps not only at integer
multiples of ℏΩ/2
but also at the Dirac point with features which are shown to depend
strongly on the laser polarization. Trigonal warping corrections are
shown to lead to important corrections for radiation in the terahertz
range, reducing the size of the dynamical gaps. Furthermore, our
analysis of the topological properties at low energies reveals that,
when irradiated with linearly polarized light, ideal bilayer graphene
behaves as a trivial insulator, whereas circular polarization leads to a
nontrivial insulator per valley.