Electric field induced localization phenomena in a ladder network with   superlattice configuration: Effect of backbone environment
  Electric field induced localization properties of a tight-binding ladder network in presence of backbone sites are investigated. Based on Green's function formalism we numerically calculate two-terminal transport together with density of states for different arrangements of atomic sites in the ladder and its backbone. Our results lead to a possibility of getting multiple mobility edges which essentially plays a switching action between a completely opaque to fully or partly conducting region upon the variation of system Fermi energy, and thus, support in fabricating mesoscopic or DNA-based switching devices. 
Paramita Dutta, Santanu K. Maiti and S. N. Karmakar
cond-mat.mes-hall