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	Photoinduced coherent acoustic phonon dynamics inside mott insulator sr2iro4 films observed by femtosecond x-ray pulses
	Zhang, Bing-Bing1; Liu, Jian2; Wei, Xu1; Sun, Da-Rui1; Jia, Quan-Jie1; Li, Yuelin3; Tao, Ye1
刊名	Applied physics letters
	2017-04-10
卷号	110期号:15页码:5
ISSN号	0003-6951
DOI	10.1063/1.4980062
通讯作者	Li, yuelin(ylli@aps.anl.gov)
英文摘要	We investigate the transient photoexcited lattice dynamics in a layered perovskite mott insulator sr2iro4 film by femtosecond x-ray diffraction using a laser plasma-based x-ray source. the ultrafast structural dynamics of sr2iro4 thin films are determined by observing the shift and broadening of (0012) bragg diffraction after excitation by 1.5 ev and 3.0 ev pump photons for films with different thicknesses. the observed transient lattice response can be well interpreted as a distinct three-step dynamics due to the propagation of coherent acoustic phonons generated by photoinduced quasiparticles (qps). employing a normalized phonon propagation model, we found that the photoinduced angular shifts of the bragg peak collapse into a universal curve after introducing normalized coordinates to account for different thicknesses and pump photon energies, pinpointing the origin of the lattice distortion and its early evolution. in addition, a transient photocurrent measurement indicates that the photoinduced qps are charge neutral excitons. mapping the phonon propagation and correlating its dynamics with the qp by ultrafast x-ray diffraction (uxrd) establish a powerful way to study electron-phonon coupling and uncover the exotic physics in strongly correlated systems under nonequilibrium conditions. published by aip publishing.
WOS关键词	LIGHT-INDUCED SUPERCONDUCTIVITY ; HIGH-TEMPERATURE
WOS研究方向	Physics
WOS类目	Physics, Applied
语种	英语
出版者	AMER INST PHYSICS
WOS记录号	WOS:000399689400013
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2177236
专题	高能物理研究所
通讯作者	Li, Yuelin
作者单位	1.Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China 2.Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA 3.Argonne Natl Lab, Xray Sci Div, Lemont, IL 60565 USA
推荐引用方式 GB/T 7714	Zhang, Bing-Bing,Liu, Jian,Wei, Xu,et al. Photoinduced coherent acoustic phonon dynamics inside mott insulator sr2iro4 films observed by femtosecond x-ray pulses[J]. Applied physics letters,2017,110(15):5.
APA	Zhang, Bing-Bing.,Liu, Jian.,Wei, Xu.,Sun, Da-Rui.,Jia, Quan-Jie.,...&Tao, Ye.(2017).Photoinduced coherent acoustic phonon dynamics inside mott insulator sr2iro4 films observed by femtosecond x-ray pulses.Applied physics letters,110(15),5.
MLA	Zhang, Bing-Bing,et al."Photoinduced coherent acoustic phonon dynamics inside mott insulator sr2iro4 films observed by femtosecond x-ray pulses".Applied physics letters 110.15(2017):5.

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