中国物理B ›› 2018, Vol. 27 ›› Issue (7): 70703-070703.doi: 10.1088/1674-1056/27/7/070703

所属专题: TOPICAL REVIEW — SECUF: Breakthroughs and opportunities for the research of physical science

• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇    下一篇

Ultrafast electron microscopy in material science

Huaixin Yang(杨槐馨), Shuaishuai Sun(孙帅帅), Ming Zhang(张明), Zhongwen Li(李中文), Zian Li(李子安), Peng Xu(徐鹏), Huanfang Tian(田焕芳), Jianqi Li(李建奇)   

  1. 1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    2 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;
    3 Collaborative Innovation Center of Quantum Matter, Beijing 100084, China
  • 收稿日期:2018-04-03 修回日期:2018-05-12 出版日期:2018-07-05 发布日期:2018-07-05
  • 通讯作者: Jianqi Li E-mail:ljq@iphy.ac.cn

Ultrafast electron microscopy in material science

Huaixin Yang(杨槐馨)1,2, Shuaishuai Sun(孙帅帅)1, Ming Zhang(张明)1,2, Zhongwen Li(李中文)1,2, Zian Li(李子安)1, Peng Xu(徐鹏)1, Huanfang Tian(田焕芳)1, Jianqi Li(李建奇)1,2,3   

  1. 1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    2 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;
    3 Collaborative Innovation Center of Quantum Matter, Beijing 100084, China
  • Received:2018-04-03 Revised:2018-05-12 Online:2018-07-05 Published:2018-07-05
  • Contact: Jianqi Li E-mail:ljq@iphy.ac.cn

摘要: Recent advances in the ultrafast transmission electron microscope (UTEM), with combined spatial and temporal resolutions, have made it possible to directly visualize the atomic, electronic, and magnetic structural dynamics of materials. In this review, we highlight the recent progress of UTEM techniques and their applications to a variety of material systems. It is emphasized that numerous significant ultrafast dynamic issues in material science can be solved by the integration of the pump-probe approach with the well-developed conventional transmission electron microscopy (TEM) techniques. For instance, UTEM diffraction experiments can be performed to investigate photoinduced atomic-scale dynamics, including the chemical reactions, non-equilibrium phase transition/melting, and lattice phonon coupling. UTEM imaging methods are invaluable for studying, in real space, the elementary processes of structural and morphological changes, as well as magnetic-domain evolution in the Lorentz TEM mode, at a high magnification. UTEM electron energy-loss spectroscopic techniques allow the examination of the ultrafast valence states and electronic structure dynamics, while photoinduced near-field electron microscopy extends the capability of the UTEM to the regime of electromagnetic-field imaging with a high real space resolution.

关键词: ultrafast transmission electron microscope (UTEM), structural dynamics, electron diffraction, ultrafast imaging

Abstract: Recent advances in the ultrafast transmission electron microscope (UTEM), with combined spatial and temporal resolutions, have made it possible to directly visualize the atomic, electronic, and magnetic structural dynamics of materials. In this review, we highlight the recent progress of UTEM techniques and their applications to a variety of material systems. It is emphasized that numerous significant ultrafast dynamic issues in material science can be solved by the integration of the pump-probe approach with the well-developed conventional transmission electron microscopy (TEM) techniques. For instance, UTEM diffraction experiments can be performed to investigate photoinduced atomic-scale dynamics, including the chemical reactions, non-equilibrium phase transition/melting, and lattice phonon coupling. UTEM imaging methods are invaluable for studying, in real space, the elementary processes of structural and morphological changes, as well as magnetic-domain evolution in the Lorentz TEM mode, at a high magnification. UTEM electron energy-loss spectroscopic techniques allow the examination of the ultrafast valence states and electronic structure dynamics, while photoinduced near-field electron microscopy extends the capability of the UTEM to the regime of electromagnetic-field imaging with a high real space resolution.

Key words: ultrafast transmission electron microscope (UTEM), structural dynamics, electron diffraction, ultrafast imaging

中图分类号:  (Electron, positron, and ion microscopes; electron diffractometers)

  • 07.78.+s
61.05.J- (Electron diffraction and scattering) 63.20.-e (Phonons in crystal lattices) 64.70.-p (Specific phase transitions)