Photoinduced phase transitions in two-dimensional charge-density-wave 1T-TaS<sub>2</sub>

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

Wen Wen^{1, 2}, Dang Chunhe^{1, 2}, Xie Liming^{1, 2, †}

Photodetectors based on the CDW phase transition in 1T-TaS₂. (a) Absorption spectrum of 1T-TaS₂. (b) The I–V curves of 1T-TaS₂ at the dark state and the light illumination of 0.7 W · cm − 2 . (c) Voltage threshold of NC-to-IC phase transition under different light irradiance. (d) The time response of photodetectors under the light pulse of 5 Hz and 0.7 mW · cm − 2 . (e) The current of device under different light intensities. (f) Spectral response of photodetector. This figure was reproduced from Ref. [47] with permission. Copyright 2018, AAAS.