Title of article
Observation of coherent higher frequency phonons in Bi2Se3 using femtosecond time-resolved reflection measurement
Author/Authors
Nakamura، نويسنده , , Kazutaka G. and Hu، نويسنده , , Jianbo and Norimatsu، نويسنده , , Katsura and Goto، نويسنده , , Arihiro and Igarashi، نويسنده , , Kyushiro and Sasagawa، نويسنده , , Takao، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2012
Pages
3
From page
902
To page
904
Abstract
The dynamics of phonons in a Bi2Se3 crystal has been studied by using femtosecond time-resolved reflection measurements. Two coherent optical phonons with A 1 g 1 and A 1 g 2 modes are observed at 2.14 and 5.09 THz at room temperature, respectively. The initial amplitude of the generated coherent A 1 g 2 phonons is higher than that of the A 1 g 1 phonons, but those are quickly damped with a rate of 1.28 THz.
Keywords
A. Thermoelectric materials , A. Topological insulators , D. Coherent phonons , E. Transient reflectivity
Journal title
Solid State Communications
Serial Year
2012
Journal title
Solid State Communications
Record number
1793275
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