Fig. 2: Time-resolved angle-resolved photoemission spectroscopy measurements of the nodal-line bulk states.
From: Ultrafast relaxation of acoustic and optical phonons in a topological nodal-line semimetal ZrSiS
Experimental band dispersion measured along the Γ–M direction at delay times of a −6.3 ps and b 0.4 ps. The states above the Fermi level, i.e., the non-equilibrium states can be observed only when the delay value is positive. c The transient electronic temperature as a function of the time delay (red dots) and the corresponding fitting curve (solid line). The fitting function is the convolution between a Gaussian pulse and a bi-exponential decay.
