Modulating Carrier Dynamics in PdSe₂: The Role of Pressure in Electronic and Phononic Interactions

Wang, Xiaowei1,2,3; Niu, Guangming1,2,4; Jiang, Jutao1,2,3; Sui, Laizhi1,2; Zeng, Xiangyu1,2,5; Liu, Xin1,2,6; Zhang, Yutong1,2; Wu, Guorong1,2; Yuan, Kaijun1,2; Yang, Xueming1,2,7

2024-07-15

10.1021/acs.nanolett.4c02300

NANO LETTERS   影响因子和分区

1530-6984

1530-6992

PdSe2 is a puckered transition metal dichalcogenide that has been reported to undergo a two-dimensional to three-dimensional structural transition under pressure. Here, we investigated the electronic and phononic evolution of PdSe2 under high pressure using pump-probe spectroscopy. We observed the electronic intraband and interband transitions occurring in the d orbitals of Pd, revealing the disappearance of the Jahn-Teller effect under high pressure. Furthermore, we found that the decay rates of interband recombination and intraband relaxation lifetimes change at 3 and 7 GPa, respectively. First-principles calculations suggest that the bandgap closure slows the decay rate of interband recombination after 3 GPa, while the saturation of phonon-phonon scattering is the main reason for the relatively constant intraband relaxation lifetime. Our work provides a novel perspective for understanding the evolution of the electron and modulation of the carrier dynamics by phonons under pressure.

carrier dynamics pump-probe high pressure phonon-phonon scattering PdSe2

SCI ; EI

英语

其他

National Natural Science Foundation of China["22241304","22225303"] ; National Natural Science Foundation of China (NSFC Center for Chemical Dynamics)[22288201] ; Scientific Instrument Developing Project of the Chinese Academy of Sciences[GJJSTD20220001] ; Innovation Program for Quantum Science and Technology[2021ZD0303304] ; Innovation Fund Project of Dalian Institute of Chemical Physics[DICP I202112]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:001276297000001

AMER CHEMICAL SOC

MATERIALS SCIENCE

Web of Science

1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Coherent Light Source, Dalian 116023, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100039, Peoples R China
4.Dalian Maritime Univ, Marine Engn Coll, Dalian 116026, Peoples R China
5.Jilin Univ, Inst Atom & Mol Phys, Changchun 130012, Peoples R China
6.Dalian Maritime Univ, Sci Coll, Dalian 116026, Peoples R China
7.Southern Univ Sci & Technol, Coll Sci, Dept Chem, Shenzhen 518055, Peoples R China

Wang, Xiaowei,Niu, Guangming,Jiang, Jutao,et al. Modulating Carrier Dynamics in PdSe₂: The Role of Pressure in Electronic and Phononic Interactions[J]. NANO LETTERS,2024,24(29).

Wang, Xiaowei.,Niu, Guangming.,Jiang, Jutao.,Sui, Laizhi.,Zeng, Xiangyu.,...&Yang, Xueming.(2024).Modulating Carrier Dynamics in PdSe₂: The Role of Pressure in Electronic and Phononic Interactions.NANO LETTERS,24(29).

Wang, Xiaowei,et al."Modulating Carrier Dynamics in PdSe₂: The Role of Pressure in Electronic and Phononic Interactions".NANO LETTERS 24.29(2024).