. "28"^^ . "RIV/68378271:_____/13:00395857!RIV14-MSM-68378271" . "Tiedtke, K." . . "Photon energy dependence of graphitization threshold for diamond irradiated with an intense XUV FEL pulse" . . "Medvedev, N." . . "Loch, R. A." . "I, P(EE2.3.30.0057), P(GA13-28721S), P(GAP108/11/1312), P(GAP205/11/0571), P(GAP208/10/2302), P(LG13029), V" . "7"^^ . . "Vorl\u00ED\u010Dek, Vladim\u00EDr" . "Ozkan, C." . "1098-0121" . . . . "96119" . "Ziaja, B." . "H\u00E1jkov\u00E1, V\u011Bra" . "4"^^ . . "Jeschke, H. O." . "RIV/68378271:_____/13:00395857" . . "graphitization; diamond; XUV; free-electron lase"@en . . "We studied experimentally and theoretically the structural transition of diamond under an irradiation with an intense femtosecond extreme ultraviolet laser (XUV) pulse of 24\u2013275 eV photon energy provided by free-electron lasers. 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."@en . "[CF817CB6D6F6]" . "Harmand, M." . "10.1103/PhysRevB.88.060101" . "Toleikis, S." . . . "US - Spojen\u00E9 st\u00E1ty americk\u00E9" . "We studied experimentally and theoretically the structural transition of diamond under an irradiation with an intense femtosecond extreme ultraviolet laser (XUV) pulse of 24\u2013275 eV photon energy provided by free-electron lasers. 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." . "Sinn, H." . . "Physical Review. B" . . "Photon energy dependence of graphitization threshold for diamond irradiated with an intense XUV FEL pulse" . "Moeller, S." . . . "Sobierajski, R." . "Saksl, K." . "Nagasono, M." . . . . "13" . . "Sov\u00E1k, P." . . . "Jurek, M." . . . "Tschentscher, T." . "Krzywinski, J." . "Juha, Libor" . "000322812700001" . "Burian, Tom\u00E1\u0161" . "Vy\u0161\u00EDn, Lud\u011Bk" . . "Toufarov\u00E1, Martina" . "Photon energy dependence of graphitization threshold for diamond irradiated with an intense XUV FEL pulse"@en . "Gaudin, J." . . "Wabnitz, H." . "Photon energy dependence of graphitization threshold for diamond irradiated with an intense XUV FEL pulse"@en . . . "Dastjani-Farahani, S." . . "88" . "Klinger, D." . "Chalupsk\u00FD, Jarom\u00EDr" .