Bi₂Te₃-хSex 〈Ag〉 (х = 0.04) nanocrystal formation

Abstract

The results of experimental researches dealing with formation of nanometricsize doped (Ag) layers on the surface (0001) between Te⁽¹⁾–Te⁽¹⁾ telluride quintet layers in Bi₂Te₃-хSex 〈Ag〉 (х = 0.04) crystals under directed crystallization has been submitted. During the crystal growth as result of impurity diffusion along a surface (0001), accumulation, redistribution and nanocrystal formation between Te⁽¹⁾–Te⁽¹⁾ layers occur. By the method of atomic-force microscopy, the Bi₂Te₃-хSex 〈Ag〉 crystal images with nanolayers were obtained. Being based on experimental data, the fractal dimension of nanocrystalline layers was estimated.