INFIQC   05475
INSTITUTO DE INVESTIGACIONES EN FISICO- QUIMICA DE CORDOBA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
One-way​ ​ ambipolar​ ​ charge​ ​ and​ ​ valley​ ​ transport​ ​ in​ ​ graphene​ ​ bilayers
Autor/es:
BERDAKIN, MATÍAS; FOA TORRES, LUIS E. F.
Lugar:
Curnavaca
Reunión:
Congreso; Transport at the Nanoscale; 2017
Resumen:
First isolated in 2004 by Nobel Laureates Andre Geim and Konstantin Novoselov,graphene has united many record electrical, mechanical, thermal and optical properties(see for example [1]). The most notable electrical properties stem from its peculiarbandstructure which close to the Fermi energy combines a linear cone-like dispersionwith pseudo-spin-momentum locking, similar to that expected for massless relativisticparticles. There are two inequivalent cones in the energy dispersion, thereby leading to abinary spin-like flavor which is called the valley (see Fig. 1). The valley degree of freedomcan​ ​ be​ ​ exploited​ ​ for​ ​ useful​ ​ functions​ ​ and​ ​ may​ ​ replace​ ​ charge​ ​ in​ ​ low​ ​ power​ ​ applications.A fundamental challenge is the formulation of a valley-controlled valleypolarization source, in which the polarization of the valley degree of freedom can beflipped. This type of switchable valley source of electrons are the cornerstone for thefuture development of new valleytronics devices [2]. Here we explore the generation ofcharge and valley polarized unidirectional transport in graphene bilayers. With this aimwe build on previous proposals [3, 4] and show how one-way ambipolar charge andvalley transport can be achieved in graphene bilayers under experimentally feasibleconditions