Transporte eletrônico em junções balísticas de três terminais de grafeno

Abstract

Graphene nanostructures with many terminals are important elements for the develop ment of future nanodevices and electronic nanocircuits. In this work, we investigate the ballistic transport of electrons through an electronic device based on graphene with th ree terminals in Y -shape. The physical system consists of the joining of three armchair graphene nanoribbons with a potential in triangular shape applied to the input lead, in order to obtain an electron targeting for a given output lead. For the computation of transport properties, we use free software based on the Python programming language (Kwant), where we define the structure of our system and calculate the conductance th rough the leads in terms of the Fermi energy and the applied potential. The results show that it is possible to modify the conductance in the output leads, showing that the proposed electronic device has great potential for nanotechnology applications