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Time- and momentum-resolved probe of heat transport in photo-excited bismuth
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View: Figures


Image of FIG. 1.
FIG. 1.

(a) Room temperature TDS images of Bi at 13 keV oriented with (11–2) nearly parallel to the x-ray direction (grazing angle =  ) with no laser illumination. (b) Calculated first order TDS, on top of which displayed the Brillouin zone boundaries. (c) Difference between laser-off and laser-late frame for comparison. (d)-(i) Differences between a few laser-early frames and laser-late frame, , showing the evolution of phonon distribution. ((c)-(i) use the same scale.)

Image of FIG. 2.
FIG. 2.

Averages of the difference data. (a) Time averaged image (normalized), in which each pixel is averaged over all the time delays; and (b) relative change of the pixel averaged data to the static image. In each case, regions around the Bragg rods were masked out.

Image of FIG. 3.
FIG. 3.

Variation of the difference-images relative to the average for selected time delays. These figures are scaled by the normalization factor used for Fig. 2(a) , so that we can compare their amplitudes.

Image of FIG. 4.
FIG. 4.

Diffuse scattering images with laser on at different time delays minus images with laser off, i.e., , from our quasi-single-shot melting measurement. Each image is averaged over 5 pulses on the same sample spot, and different delay images are taken on different spots.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Time- and momentum-resolved probe of heat transport in photo-excited bismuth