Record Details

Title:
Photon energy dependence of graphitization threshold for diamond irradiated with an intense XUV FEL pulse
Affiliation(s):
EuXFEL staff
Author group:
Management Board
X-Ray Optics
Abstract:
We studied experimentally and theoretically the structural transition of diamond under an irradiation with anintense femtosecond extreme ultraviolet laser (XUV) pulse of 24–275 eV photon energy provided by free-electronlasers. Experimental results obtained show that the irradiated diamond undergoes a solid-to-solid phase transition to graphite, and not to an amorphous state. Our theoretical findings suggest that the nature of this transition is nonthermal, stimulated by a change of the interatomic potential triggered by the excitation of valence electrons. Ultrashort laser pulse duration enables to identify the subsequent steps of this process: electron excitation, band gap collapse, and the following atomic motion. A good agreement between the experimentally measured and theoretically calculated damage thresholds for the XUV range supports our conclusions.
Imprint:
College Park, Md., APS, 2013
Journal Information:
Phys. Rev. B, 88, 6, 060101 (2013)
ISSN:
0163-1829
1095-3795
1550-235X
0556-2805
1098-0121
Related external records:
DOI: 10.1103/PhysRevB.88.060101
WOS: WOS:000322812700001
Language(s):
English


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 Record created 2016-10-11, last modified 2019-01-30

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