We propose an efficient numerical method to study the transport properties of armchair graphene ribbons in the presence of a generic external potential. The method is based on a continuum envelope-function description with physical boundary conditions. The envelope functions are computed in the reciprocal space, and the transmission is then obtained with a recursive scattering matrix approach. This allows a significant reduction of the computational time with respect to finite difference simulations.
High-performance solution of the transport problem in a graphene armchair structure with a generic potential / Logoteta, Demetrio; Marconcini, Paolo; Bonati, Claudio; Fagotti, Maurizio; Macucci, Massimo. - In: PHYSICAL REVIEW E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS. - ISSN 1539-3755. - 89:6(2014), pp. 063309-1-063309-11. [10.1103/PhysRevE.89.063309]
High-performance solution of the transport problem in a graphene armchair structure with a generic potential
LOGOTETA, DEMETRIO;
2014
Abstract
We propose an efficient numerical method to study the transport properties of armchair graphene ribbons in the presence of a generic external potential. The method is based on a continuum envelope-function description with physical boundary conditions. The envelope functions are computed in the reciprocal space, and the transmission is then obtained with a recursive scattering matrix approach. This allows a significant reduction of the computational time with respect to finite difference simulations.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.