Fig. 2: Ultrafast dynamics at various temperatures. | Nature Communications

Fig. 2: Ultrafast dynamics at various temperatures.

From: Three-dimensional ultrafast charge-density-wave dynamics in CuTe

Fig. 2

a ΔR/R along a-axis (θ = 8°, ϕ1 and ϕ2 = 0°) of a CuTe single crystal at various temperatures. Inset: a typical oscillation component of ΔR/R spectra at 37 K after subtracting the decay background (dashed line fitted by Eq. (1)). b Spectrogram of the oscillation components at 37 K and 280 K in (a) after short-time Fourier transformation. c, d Simulated the oscillation components of ΔR/R spectra (black and solid circles are experimental data in (a)) at low (e.g., TeL = 37 K) and high (e.g., TeH = 280 K) temperatures in (a) using the TDGL equation, Supplementary Eq. (1). V(Te, t): the ground-state double-well potential as a function of electron temperature Te and delay time t. V(TeL0(eH0), t0): the high-symmetry state at zero delay time t0 for lower (higher) electron temperature TeL0 (TeH0) after pumping. V(TeL1(eH1), t1): the double-well potential at delay time t1 for lower (higher) electron temperature TeL1 (TeH1) after relaxation.

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