Preparation of an Atomically Clean and Structurally Ordered Bi2Se3 (0001) Surface without Molecular Beams and Vacuum Cleaving

In this study, an atomically clean and structurally ordered Bi2Se3 (0001) surface is obtained without molecular beams and vacuum cleaving. It is shown that the chemical treatment of Bi2Se3 (0001) in an anhydrous solution of hydrogen chloride in isopropyl alcohol leads to the removal of native oxides and enrichment of the surface with an elemental selenium layer. Heating in an ultrahigh vacuum at a temperature of 170°C leads to the desorption of the elemental selenium layer from the surface and the formation of a structurally ordered unreconstructed Bi2Se3 (0001) surface with the linear dispersion law.