Evidence for electron-electron interaction in topological insulator thin films
Evidence for electron-electron interaction in topological insulator thin films
We consider in our work single crystal thin films of Bi${}_{2}$Se${}_{3}$, grown by molecular beam epitaxy, both with and without Pb doping. Angle-resolved photoemission data demonstrate topological surface states with a Fermi level lying inside the bulk band gap in the Pb-doped films. Transport data show weak localization behavior, as …