Nonequilibrium electron and lattice dynamics of Sb2Te3 under pressure

doi:10.1103/PhysRevB.105.195109

	Nonequilibrium electron and lattice dynamics of Sb2Te3 under pressure
	Zhang, Kai 2; Xie, Jiafeng 3; Yang, Jin 2; Jiang, Huachao 2; Zhang, Shile 1; Zeng, Zhi 2; Chen, Xiaojia 4; Wang, Tianwu 3; Su, Fuhai 2
刊名	PHYSICAL REVIEW B
	2022-05-06
卷号	105
ISSN号	2469-9950
DOI	10.1103/PhysRevB.105.195109
通讯作者	Wang, Tianwu(wangtw@aircas.ac.cn)
英文摘要	Combined measurements including Raman scattering and optical pump-probe spectroscopy (OPPS) are carried out to investigate the lattice and electron dynamics of Sb2Te3 under hydrostatic pressures. The pressure evolutions of nonequilibrium photocarrier dynamics, containing the hot electron relaxations and coherent acoustic phonons, have been accessed up to 30 GPa. With increasing pressure, the Raman vibrations and electron relaxations manifest anomalies around 3 GPa and 5 GPa, indicating the sudden changes of electron-phonon couplings across the electronic topological transition (ETT) and semiconductor-semimetal transition (SST). Especially, the OPPS reveals that the hot phonon bottleneck is effectively suppressed along with the onset of ETT, which is likely due to the abrupt increase in the density of state and the number of energy valley in conduction band, basing on the calculated electronic and lattice structures. Furthermore, a comprehensive phase diagram of Sb2Te3 composed with ETT, SST, as well as the additional three high-pressure structures and a mixture phase has been distinguished according to the pressure behavior of OPPS. Our paper not only develop understandings for the interactions between electron and lattice in Sb2Te3, but also may provide a strategy to probe the electronic topological changes under pressure.
资助项目	National Natural Science Foundation of China[12004387] ; National Natural Science Foundation of China[11774354] ; National Natural Science Foundation of China[12174398] ; National Natural Science Foundation of China[51727806] ; National Natural Science Foundation of China[12127807] ; Science Challenge Project[TZ2016001] ; CAS Innovation Grant[CXJJ-19-B08] ; Hefei Science Center CAS[2018HSCKPRD003]
WOS关键词	PHASE-TRANSITION ; TOPOLOGICAL INSULATORS ; RAMAN-SCATTERING ; RELAXATION ; PRINCIPLES ; CARRIER ; SURFACE ; METALS ; BI2TE3 ; BI2SE3
WOS研究方向	Materials Science ; Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000804737800001
资助机构	National Natural Science Foundation of China ; Science Challenge Project ; CAS Innovation Grant ; Hefei Science Center CAS
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/131111]
专题	中国科学院合肥物质科学研究院
通讯作者	Wang, Tianwu
作者单位	1.Chinese Acad Sci, Anhui Key Lab Condensed Matter Phys Extreme Condi, High Field Magnet Lab, HFIPS, Hefei 230031, Anhui, Peoples R China 2.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, HFIPS, Hefei 230031, Peoples R China 3.Chinese Acad Sci, Aerosp Informat Res Inst, GBA Branch, Guangzhou 510700, Peoples R China 4.Ctr High Pressure Sci & Technol Adv Res, Shanghai 201203, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Kai,Xie, Jiafeng,Yang, Jin,et al. Nonequilibrium electron and lattice dynamics of Sb2Te3 under pressure[J]. PHYSICAL REVIEW B,2022,105.
APA	Zhang, Kai.,Xie, Jiafeng.,Yang, Jin.,Jiang, Huachao.,Zhang, Shile.,...&Su, Fuhai.(2022).Nonequilibrium electron and lattice dynamics of Sb2Te3 under pressure.PHYSICAL REVIEW B,105.
MLA	Zhang, Kai,et al."Nonequilibrium electron and lattice dynamics of Sb2Te3 under pressure".PHYSICAL REVIEW B 105(2022).