Fig. 1: Photo-induced in-plane reflectivity traces on undoped BaNi2As2 single crystal.
From: Dynamics of collective modes in an unconventional charge density wave system BaNi2As2
a Transient reflectivity traces, ΔR/R(t), between 13 and 149 K, measured with fluence F = 0.4 mJ cm−2, upon increasing the temperature. b Decomposition of the reflectivity transient at 13 K (black dotted line) into overdamped (solid red line) and oscillatory (solid blue line) components. Insert shows the individual overdamped components (dotted and dashed blue lines). c Oscillatory response at selected temperatures, together with fits using a sum of four damped oscillators (black dashed lines). Signals at 138 and 149 K are multiplied by a factor of 2 and 20, respectively.
