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Broadband hot-carrier dynamics in three-dimensional Dirac semimetal Cd3As2

Journal Article


Abstract


  • The hot-carrier relaxation dynamics of Cd 3 As 2 thin films has been investigated by using femtosecond pump-probe spectroscopy in a transmission geometry. A comparative study of degenerate and non-degenerate experiments reveals that hot-carrier distribution in Cd 3 As 2 is established with a time constant of ∼400 fs. Significantly, the broadband measurements allow the extraction of the time evolution of electron temperature and the carrier-phonon coupling factor g = 5.3 × 10 15 W m -3 K -1 is deduced by a semiclassical two-temperature model. These results provide fundamental insights into the hot-carrier dynamics of Cd 3 As 2 .

Authors


  •   Zhu, Chunhui (external author)
  •   Yuan, Xiang (external author)
  •   Xiu, Faxian (external author)
  •   Chao Zhang
  •   Xu, Yongbing (external author)
  •   Zhang, Rong (external author)
  •   Shi, Yi (external author)
  •   Wang, Fengqiu (external author)

Publication Date


  • 2017

Citation


  • Zhu, C., Yuan, X., Xiu, F., Zhang, C., Xu, Y., Zhang, R., Shi, Y. & Wang, F. (2017). Broadband hot-carrier dynamics in three-dimensional Dirac semimetal Cd3As2. Applied Physics Letters, 111 (9), 091101-1-091101-4.

Scopus Eid


  • 2-s2.0-85028540407

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2721

Start Page


  • 091101-1

End Page


  • 091101-4

Volume


  • 111

Issue


  • 9

Place Of Publication


  • United States

Abstract


  • The hot-carrier relaxation dynamics of Cd 3 As 2 thin films has been investigated by using femtosecond pump-probe spectroscopy in a transmission geometry. A comparative study of degenerate and non-degenerate experiments reveals that hot-carrier distribution in Cd 3 As 2 is established with a time constant of ∼400 fs. Significantly, the broadband measurements allow the extraction of the time evolution of electron temperature and the carrier-phonon coupling factor g = 5.3 × 10 15 W m -3 K -1 is deduced by a semiclassical two-temperature model. These results provide fundamental insights into the hot-carrier dynamics of Cd 3 As 2 .

Authors


  •   Zhu, Chunhui (external author)
  •   Yuan, Xiang (external author)
  •   Xiu, Faxian (external author)
  •   Chao Zhang
  •   Xu, Yongbing (external author)
  •   Zhang, Rong (external author)
  •   Shi, Yi (external author)
  •   Wang, Fengqiu (external author)

Publication Date


  • 2017

Citation


  • Zhu, C., Yuan, X., Xiu, F., Zhang, C., Xu, Y., Zhang, R., Shi, Y. & Wang, F. (2017). Broadband hot-carrier dynamics in three-dimensional Dirac semimetal Cd3As2. Applied Physics Letters, 111 (9), 091101-1-091101-4.

Scopus Eid


  • 2-s2.0-85028540407

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2721

Start Page


  • 091101-1

End Page


  • 091101-4

Volume


  • 111

Issue


  • 9

Place Of Publication


  • United States