Optically induced lattice dynamics probed with ultrafast x-ray diffraction

Physical Review B - Condensed Matter and Materials Physics

Volumn 77, Issue 13, 2008, Pages

  Lee, H J ^a   Workman, J ^a   Wark, J S ^b   Averitt, R D ^a   Taylor, A J ^a   Roberts, J ^a   McCulloch, Q ^a   Hof, D E ^a   Hur, N ^c   Cheong, S W ^c   Funk, D J ^a  

^a LOS ALAMOS NATIONAL LABORATORY   (United States)

^b UNIVERSITY OF OXFORD   (United Kingdom)

^c RUTGERS UNIVERSITY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 43049094408     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.77.132301     Document Type: Article

References (18)

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15. We used a value of density calculated from the volume of one unit cell.
16. We also compared the profiles of convolved Fig. 2 with profiles of the experimental curve, which is not shown in this Brief Report. The profiles of convolved Fig. 2 showed good agreement only at early time delay, but above 60 ps, it quickly recovered as compared to those of the experimental data.
17. With a laser fluence of 8 mJ/ cm2, we also checked parameter combinations of ζ and c33 / c13. While the calculation with ζ∼125 nm shows a larger angle change than the experimental result and a quick recovery, the calculation with ζ∼250 nm shows a similar angle shift with the experimental result and Fig. 4.
18. From the sound velocity (7640 m/s) and the x-ray penetration depth (δx, 0.5 μm) at 1.48 keV, we can calculate a time from δx /ν, which approximates the mechanical relaxation time.