期刊論文
| 學年 | 111 |
|---|---|
| 學期 | 1 |
| 出版（發表）日期 | 2022-10-24 |
| 作品名稱 | Nematic electron and phonon dynamics in SnS crystals |
| 作品名稱（其他語言） | |
| 著者 | Hsueh, Hung-chung |
| 單位 | |
| 出版者 | |
| 著錄名稱、卷期、頁數 | Applied Physics Letters 121(17) |
| 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. |
| 關鍵字 | Phonons；Nonequilibrium thermodynamics；2D materials；Ultrafast phenomena；Photoexcitations；Pump probe spectroscopy |
| 語言 | en_US |
| ISSN | 1077-3118 |
| 期刊性質 | 國外 |
| 收錄於 | SCI Scopus |
| 產學合作 | |
| 通訊作者 | Hsueh, Hung-chung; Lue, Chin-shan; Luo, Chih-wei |
| 審稿制度 | 是 |
| 國別 | USA |
| 公開徵稿 | |
| 出版型式 | ,電子版,紙本 |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/124090 ) |