Fig. 2: Out-of-equilibrium tr-ARPES measurements. | Nature Communications

Fig. 2: Out-of-equilibrium tr-ARPES measurements.

From: Field-induced ultrafast modulation of Rashba coupling at room temperature in ferroelectric α-GeTe(111)

Fig. 2

a tr-ARPES spectra of α-GeTe(111) recorded at pump-probe delays of a −200 fs and b +200 fs. The data have been acquired along the \(\bar{K}-\bar{\Gamma }-\bar{K}\) direction with an absorbed pump fluence of 1 mJ/cm2. c Difference plot between panels b and a. Red and blue colors correspond to an increase and a depletion of photoemission intensity, respectively. The two arrows highlight the transient shift of the crossing point of the bulk states at normal emission (CPB) and the B1 contribution. This shift is visible as a red/blue contrast on the difference map. Energy distribution curves (EDCs) at −200 fs (black) and +200 fs (red) taken at d k = 0 Å−1 (normal emission) and e k = 0.2 Å−1 (off-normal emission) : see vertical dashed lines in panel b. Solid lines correspond to a fit of the raw data.

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