Fig. 4: Theoretical modeling of experimentally obtained data.
From: Ultrafast relaxation of acoustic and optical phonons in a topological nodal-line semimetal ZrSiS
a Comparison between the transient electronic temperature of the nodal-line bulk and the surface states. The measured temperature data are shown as dots, with the convolution fitting shown as lines. The decay time of the nodal-line bulk state is found to be longer than the surface state. b The measured bulk temperatures are shown as red dots. The blue and black lines, which are obtained from our theory, represent the optical and acoustic phonons, respectively.
