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Ultrafast carrier and phonon dynamics in crystals
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View: Figures


Image of FIG. 1.
FIG. 1.

Time-resolved response of at room temperature for the pump-probe photon energy 1.63 eV over long (main panel) and short (inset) timescales. A schematic drawing of the measurement configuration is also shown in the inset.

Image of FIG. 2.
FIG. 2.

signal of as a function of delay time at . The best fit to data (red solid line) is obtained by using a model consisting of three independent exponential relaxation processes with time constant (short dashed line), (dashed-dot line), and (dashed line). Inset: Extracted oscillations from the measured and the best fit to data (red solid line) as an exponentially damped oscillation.

Image of FIG. 3.
FIG. 3.

Side-by-side comparison of the signals of exposed to air and in vacuum at three different excitation photon energies. Traces are offset for clarity. The red solid lines are the best fits to data with three independent exponential relaxation processes.

Image of FIG. 4.
FIG. 4.

and as a function of for crystals exposed to air (filled dots) and in vacuum (open squares). Solid and dashed lines are the guides to the eye.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Ultrafast carrier and phonon dynamics in Bi2Se3 crystals