Ultrafast Switching from the Charge Density Wave Phase to a Metastable Metallic State in 1T-TiSe2

doi:10.1103/PhysRevLett.130.226501

	Ultrafast Switching from the Charge Density Wave Phase to a Metastable Metallic State in 1T-TiSe2
	Duan, Shaofeng 1; Xia, Wei2 ; Huang, Chaozhi 1; Wang, Shichong 1; Gu, Lingxiao 1; Liu, Haoran 1; Xiang, Dao 3,4; Qian, Dong 1,4,5; Guo, Yanfeng2 ; Zhang, Wentao 1,5
	2023-06-02
发表期刊	PHYSICAL REVIEW LETTERS (IF:8.1[JCR-2023],8.3[5-Year])
ISSN	0031-9007
EISSN	1079-7114
卷号	130 期号:22
DOI	10.1103/PhysRevLett.130.226501
摘要	The ultrafast electronic structures of the charge density wave material 1T-TiSe2 were investigated by high-resolution time- and angle-resolved photoemission spectroscopy. We found that the quasiparticle populations drove ultrafast electronic phase transitions in 1T-TiSe2 within 100 fs after photoexcitation, and a metastable metallic state, which was significantly different from the equilibrium normal phase, was evidenced far below the charge density wave transition temperature. Detailed time- and pump-fluence-dependent experiments revealed that the photoinduced metastable metallic state was a result of the halted motion of the atoms through the coherent electron-phonon coupling process, and the lifetime of this state was prolonged to picoseconds with the highest pump fluence used in this study. Ultrafast electronic dynamics were well captured by the time-dependent Ginzburg-Landau model. Our work demonstrates a mechanism for realizing novel electronic states by photoinducing coherent motion of atoms in the lattice. © 2023 American Physical Society.
关键词	Charge density Electron-phonon interactions Electronic structure Photoelectron spectroscopy Charge-density wave material Charge-density-wave phasis Electronic.structure High resolution Metallic state Metastables Pump fluence Resolution time Ultra-fast Ultrafast switching
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收录类别	EI
语种	英语
出版者	American Physical Society
EI入藏号	20232514252914
EI主题词	Charge density waves
EI分类号	701.1 Electricity: Basic Concepts and Phenomena ; 931.3 Atomic and Molecular Physics ; 931.4 Quantum Theory ; Quantum Mechanics ; 933 Solid State Physics
原始文献类型	Journal article (JA)
引用统计	正在获取...
文献类型	期刊论文
条目标识符	https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/359934
专题	物质科学与技术学院物质科学与技术学院_PI研究组_郭艳峰组物质科学与技术学院_公共科研平台_拓扑物理实验室
作者单位	1.Key Laboratory of Artificial Structures and Quantum Control, Ministry of Education, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai; 200240, China; 2.School of Physical Science and Technology, ShanghaiTech University, Shanghai; 201210, China; 3.Key Laboratory for Laser Plasmas, Ministry of Education, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai; 200240, China; 4.Tsung-Dao Lee Institute, Shanghai Jiao Tong University, Shanghai; 200240, China; 5.Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing; 210093, China
推荐引用方式 GB/T 7714	Duan, Shaofeng,Xia, Wei,Huang, Chaozhi,et al. Ultrafast Switching from the Charge Density Wave Phase to a Metastable Metallic State in 1T-TiSe2[J]. PHYSICAL REVIEW LETTERS,2023,130(22).
APA	Duan, Shaofeng.,Xia, Wei.,Huang, Chaozhi.,Wang, Shichong.,Gu, Lingxiao.,...&Zhang, Wentao.(2023).Ultrafast Switching from the Charge Density Wave Phase to a Metastable Metallic State in 1T-TiSe2.PHYSICAL REVIEW LETTERS,130(22).
MLA	Duan, Shaofeng,et al."Ultrafast Switching from the Charge Density Wave Phase to a Metastable Metallic State in 1T-TiSe2".PHYSICAL REVIEW LETTERS 130.22(2023).