Nematic electron and phonon dynamics in SnS crystals

機構典藏 > College of Sciences > Graduate Institute & Department of Physics > Journal Article > Item 987654321/124090

jsp.display-item.identifier=請使用永久網址來引用或連結此文件: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/124090

题名:	Nematic electron and phonon dynamics in SnS crystals
作者:	Hsueh, Hung-chung
关键词:	Phonons；Nonequilibrium thermodynamics；2D materials；Ultrafast phenomena；Photoexcitations；Pump probe spectroscopy
日期:	2022-10-24
上传时间:	2023-05-15 12:05:34 (UTC+8)
出版者:	AIP (美國物理協會)
摘要:	Tin sulfide (SnS) is one of the promising materials for the applications of optoelectronics and photovoltaics. This study determines the nematic dynamics of photoexcited electrons and phonons in SnS single crystals using polarization-dependent pump–probe spectroscopy at various temperatures. As well as the fast (0.21–1.38 ps) and slow (>5 ps) relaxation processes, a 36–41 GHz coherent acoustic phonon with a sound velocity of 4883 m/s that is generated by the thermoelastic effect is also observed in the transient reflectivity change (DR/R) spectra. Electrons and coherent acoustic phonons show significant in-plane anisotropy from 330 to 430 K due to strong electron–phonon coupling. However, this in-plane anisotropy weakens dramatically in the low-temperature (<330 K) and high-temperature (>430 K) phases. These results add to the knowledge about the anisotropy of electrons and coherent acoustic phonons that give SnS applications in photovoltaic or optoelectronic devices.
關聯:	Applied Physics Letters 121(17)
DOI:	10.1063/5.0099486
显示于类别:	[Graduate Institute & Department of Physics] Journal Article

文件中的档案:

档案	描述	大小	格式	浏览次数
index.html		0Kb	HTML	86	检视/开启

在機構典藏中所有的数据项都受到原著作权保护.

TAIR相关文章