The effect of Landau subbands broadening on transport of disordered four-terminal graphene nanodevice

In this paper, we have studied the transport properties of disordered four-terminal graphene nanodevice in the presence of perpendicular magnetic field, using landauer approach and tight binding model. the results of our investigation imply that in the presence of random disorder the transport of the system decreases because of anderson localization. furthermore, the broadening widths of landau subbands become large in the presence of random disorder and magnetic field. the existence of divacancy and magnetic field creates additional band between landau levels, this appeared by increasing the transmission of the injected electron. in addition we found that the coupling between two vacancies due to “vacancy molecule” and bonding between them can be tuned by the magnetic field. these theoretical studies can be useful to design the electronic nanodevice.