Fig. 4. (a) Edge-step normalized Bi LIII XANES spectra of the thin film and the bulk samples of Bi2Te3, along with those of the reference standards (γ-Bi2O3, β-Bi2O3, Bi(OH)3, Bi2O4), (b) the first derivative of XANES spectra at Bi LIII-edge of thin film and bulk samples of Bi2Te3, along with those of theoretically calculated spectrum of Bi2Te3, and reference standards (γ-Bi2O3, β-Bi2O3, Bi(OH)3, Bi2O4); plots are offset for clarity.
