Surface phonons in topological insulator Bi2Te3 investigated by Brillouin light scattering

被引：6
|
作者：
Trzaskowska, Aleksandra [1 ]
Mroz, Boguslaw [1 ]
机构：
[1] Adam Mickiewicz Univ, Fac Phys, Uniwersytetu Poznanskiego 2, PL-61614 Poznan, Poland
来源：
SCIENTIFIC REPORTS | 2020年 / 10卷 / 01期
关键词：
BI2SE3; FILMS; PROPAGATION; SB2TE3; WAVES; RAMAN;
D O I：
10.1038/s41598-020-68690-z
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
High resolution Brillouin spectroscopy was used for the first time to study the dispersion and anisotropy of surface phonons in the single crystal of topological insulator Bi2Te3. Two surface acoustic waves have been observed, which distinguishes this material from other metals or nontransparent materials. The modes were assigned as Rayleigh waves. The obtained results were then simulated by Finite Element Method. The layered structure of the unit cell proposed in simulation reproduced quite well experimental results of the modes dispersion and anisotropy.
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页数：8
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