Electronic states and spin-filter effect in three-dimensional topological insulator Bi<sub>2</sub>Se<sub>3</sub> nanoribbons

Electronic states and spin-filter effect in three-dimensional topological insulator Bi₂Se₃ nanoribbons

Liu Genhua^{1, 2, †}, Xiao Pingguo¹, Xu Piaorong¹, Zhou Huiying¹, Zhou Guanghui²

(color online) (a) Schematic of the nanoribbon. A fixed electric field E_z is perpendicular to the two ends of the nanoribbon, and a turnable electric field E_y is perpendicular to the intermediate section of the nanoribbon. (b) The conductances of the Bi₂Se₃ nanoribbon as a function of E_y at ε = 90 meV. (c) of the nanoribbon as a function of E_y at ε = 90, 92, and 95 meV, respectively.