Title

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

RIS ID

116248

Publication Details

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.

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 x 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 .

Grant Number

ARC/DP160101474

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