Ultrafast generation and detection of coherent acoustic phonons in SnS0.91Se0.09

Xiao-Ran Ma; Ya-Chao Li; Chao Ge; Peng Wang; Hai-Ying Song; Shi-Bing Liu

Results in Physics (Feb 2023)

Ultrafast generation and detection of coherent acoustic phonons in SnS0.91Se0.09

Xiao-Ran Ma,
Ya-Chao Li,
Chao Ge,
Peng Wang,
Hai-Ying Song,
Shi-Bing Liu

Affiliations

Xiao-Ran Ma: Strong-field and Ultrafast Photonics Lab, Key Laboratory of Trans-scale Laser Manufacturing Technology, Ministry of Education, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China; Strong-field and Ultrafast Photonics Lab, Beijing Engineering Research Center of Laser Technology, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China
Ya-Chao Li: Strong-field and Ultrafast Photonics Lab, Key Laboratory of Trans-scale Laser Manufacturing Technology, Ministry of Education, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China; Strong-field and Ultrafast Photonics Lab, Beijing Engineering Research Center of Laser Technology, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China
Chao Ge: Strong-field and Ultrafast Photonics Lab, Key Laboratory of Trans-scale Laser Manufacturing Technology, Ministry of Education, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China; Strong-field and Ultrafast Photonics Lab, Beijing Engineering Research Center of Laser Technology, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China
Peng Wang: Strong-field and Ultrafast Photonics Lab, Key Laboratory of Trans-scale Laser Manufacturing Technology, Ministry of Education, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China; Strong-field and Ultrafast Photonics Lab, Beijing Engineering Research Center of Laser Technology, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China
Hai-Ying Song: Corresponding author.; Strong-field and Ultrafast Photonics Lab, Key Laboratory of Trans-scale Laser Manufacturing Technology, Ministry of Education, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China; Strong-field and Ultrafast Photonics Lab, Beijing Engineering Research Center of Laser Technology, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China
Shi-Bing Liu: Strong-field and Ultrafast Photonics Lab, Key Laboratory of Trans-scale Laser Manufacturing Technology, Ministry of Education, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China; Strong-field and Ultrafast Photonics Lab, Beijing Engineering Research Center of Laser Technology, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China

Journal volume & issue: Vol. 45
p. 106241

Abstract

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The rapid growth of attention to tin sulfide (SnS) is due to its efficient application in the field of thermoelectricity, and its doping product SnS0.91Se0.09 can obtain a high average thermoelectric figure of merit (ZTave≈ 1.25). Although many efforts have been made to reveal the mechanisms associated with electron transport and heat conduction, the role of lattice vibration remains poorly understood. Here, we studied the coherent vibration dynamics in SnS0.91Se0.09 bulk single crystal by using the femtosecond two-color pump-probe optical reflectivity technique. The oscillation signal in the time domain of SnS0.91Se0.09 is considered to be an electron–phonon interaction. The coherent dynamics of longitudinal acoustic phonons in this coupling behavior is closely related to probe polarization and excitation power. The stability of oscillation frequency reveals the microscopic mechanism of phonon conduction, and further understands the lattice nonharmonic caused by electron–phonon interaction in light-induced.

Published in Results in Physics

ISSN: 2211-3797 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Physics
Website: http://www.journals.elsevier.com/results-in-physics/

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