INVESTIGADORES
STURLA Mauricio Bernardo
artículos
Título:
Generalized effective Hamiltonian for graphene under nonuniform strain
Autor/es:
JUAN L. MAÑES; FERNANDO DE JUAN; MAURICIO STURLA ; MARÍA A. H. VOZMEDIANO
Revista:
PHYSICAL REVIEW B
Editorial:
AMER PHYSICAL SOC
Referencias:
Lugar: New York; Año: 2013 p. 155405 - 155417
ISSN:
1098-0121
Resumen:
We use a symmetry approach to construct a systematic derivative expansion of the low-energy effective Hamiltonian modifying the continuum Dirac description of graphene in the presence of nonuniform elastic deformations. We extract all experimentally relevant terms and describe their physical significance. Among them there is a new gap-opening term that describes the Zeeman coupling of the elastic pseudomagnetic field and the pseudospin. We determine the value of the couplings using a generalized tight-binding model.
