Effect of band-alignment operation on carrier transport in Bi2Se3 topological insulator.

ABSTRACT: Band-alignment induced current modulation in Bi2Se3 three-dimensional topological insulator slab has been investigated by quantum transport simulations for three different device designs, one for purely lateral transport and other two with vertical transport. Non-Equilibrium Green Function formalism has been deployed to understand the transport mechanism in band-alignment devices to appraise the possibility of a 3D-TI based resonant device. A resonance condition is observed when the Dirac-points (bands) are aligned. This results in the maximum current at resonance for the design with only lateral transport. However, current ratio between resonant and non-resonant condition is found to be relatively small and strong temperature dependence is also noticed. The other two designs with vertical

SUBMITTER: Gupta G 

PROVIDER: S-EPMC4147365 | biostudies-literature | 2014 Aug

REPOSITORIES: biostudies-literature