中国物理B ›› 2019, Vol. 28 ›› Issue (5): 58504-058504.doi: 10.1088/1674-1056/28/5/058504

所属专题: TOPICAL REVIEW — Photodetector: Materials, physics, and applications

• TOPICAL REVIEW—Photodetector: materials, physics, and applications • 上一篇    

Photoinduced phase transitions in two-dimensional charge-density-wave 1T-TaS2

Wen Wen(文雯), Chunhe Dang(党春鹤), Liming Xie(谢黎明)   

  1. 1 CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China;
    2 University of Chinese Academy of Sciences, Beijing 100049, China
  • 收稿日期:2019-02-23 修回日期:2019-03-18 出版日期:2019-05-05 发布日期:2019-05-05
  • 通讯作者: Liming Xie E-mail:xielm@nanoctr.cn
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 21673058 and 21822502), the Key Research Program of Frontier Sciences of Chinese Academy of Sciences (Grant No. QYZDB-SSW-SYS031), and the Strategic Priority Research Program of Chinese Academy of Sciences (Grant No. XDB30000000).

Photoinduced phase transitions in two-dimensional charge-density-wave 1T-TaS2

Wen Wen(文雯)1,2, Chunhe Dang(党春鹤)1,2, Liming Xie(谢黎明)1,2   

  1. 1 CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China;
    2 University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2019-02-23 Revised:2019-03-18 Online:2019-05-05 Published:2019-05-05
  • Contact: Liming Xie E-mail:xielm@nanoctr.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 21673058 and 21822502), the Key Research Program of Frontier Sciences of Chinese Academy of Sciences (Grant No. QYZDB-SSW-SYS031), and the Strategic Priority Research Program of Chinese Academy of Sciences (Grant No. XDB30000000).

摘要:

Charge-density-wave (CDW) materials with strongly correlated electrons have broadband light absorption and ultrafast response to light irradiation, and hence hold great potential in photodetection. 1T-TaS2 is a typical CDW material with various thermodynamically CDW ground states at different temperatures and fertile out-of-equilibrium intermediate/hidden states. In particular, the light pulses can trigger melting of CDW ordering and also forms hidden states, which exhibits strikingly different electrical conductivity compared to the ground phase. Here, we review the recent research on phase transitions in 1T-TaS2 and their potential applications in photodetection. We also discuss the ultrafast melting of CDW ordering by ultrafast laser irradiation and the out-of-equilibrium intermediate/hidden states by optical/electrical pulse. For photodetection, demonstrations of photoconductors and bolometers are introduced. Finally, we discuss some of the challenges that remain.

关键词: charge density wave, phase transition, 1T-TaS2, photodetection

Abstract:

Charge-density-wave (CDW) materials with strongly correlated electrons have broadband light absorption and ultrafast response to light irradiation, and hence hold great potential in photodetection. 1T-TaS2 is a typical CDW material with various thermodynamically CDW ground states at different temperatures and fertile out-of-equilibrium intermediate/hidden states. In particular, the light pulses can trigger melting of CDW ordering and also forms hidden states, which exhibits strikingly different electrical conductivity compared to the ground phase. Here, we review the recent research on phase transitions in 1T-TaS2 and their potential applications in photodetection. We also discuss the ultrafast melting of CDW ordering by ultrafast laser irradiation and the out-of-equilibrium intermediate/hidden states by optical/electrical pulse. For photodetection, demonstrations of photoconductors and bolometers are introduced. Finally, we discuss some of the challenges that remain.

Key words: charge density wave, phase transition, 1T-TaS2, photodetection

中图分类号:  (Photodetectors (including infrared and CCD detectors))

  • 85.60.Gz
95.55.Rg (Photoconductors and bolometers) 71.45.Lr (Charge-density-wave systems)