Author:
Cheng Jing,Niherysh Kiryl A.,Francis Peter,Chakraborty Debamitra,Lombardi Floriana,Erts Donats,Prischepa Serghej L.,Łaszcz Adam,Komissarov Ivan V.,Sobolewski Roman
Abstract
The dynamics of coherent acoustic phonons in the Bi2Se3 layered crystal system are investigated. The findings reveal that the frequency evolution of breathing modes with the number of the material quintuple layers and the dispersion relation both can be explained by a modified chain model with a nonuniform coupling force.