Atomic-Scale Visualization of Inertial Dynamics
A. M. Lindenberg(Lund University), Jörgen Larsson(Lund University), K. Sokolowski-Tinten(Lund University), Kelly J. Gaffney(Lund University), C. Blome(Lund University), O. Synnergren(Lund University), J. Sheppard(Lund University), Carl Caleman(Uppsala University), A. G. MacPhee(Lund University), David M. Weinstein(Lund University), D. P. Lowney(Lund University), Thomas K. Allison(Lund University), Tyler S. Matthews(Lund University), R. W. Falcone(Lund University), A. L. Cavalieri(Lund University), D. M. Fritz(Lund University), S. H. Lee(Lund University), P. H. Bucksbaum(Lund University), D. A. Reis(Lund University), J. Rudati(Lund University), P. H. Fuoss(Lund University), C. C. Kao(Lund University), D. P. Siddons(Lund University), R. Pahl(Lund University), J. Als‐Nielsen(Lund University), S. Duesterer(Lund University), R. Ischebeck(Lund University), H. Schlarb(Lund University), H. Schulte‐Schrepping(Lund University), T. Tschentscher(Lund University), J. Schneider(Lund University), D. von der Linde(Lund University), O. Hignette(Lund University), F. Sette(Lund University), Henry N. Chapman(Lund University), R. W. Lee(Lund University), T. N. Hansen(Lund University), Simone Techert(Lund University), J. S. Wark(Lund University), M. Bergh(Uppsala University), G. Huldt(Uppsala University), David van der Spoel(Uppsala University), Nicuşor Tı̂mneanu(Uppsala University), János Hajdu(Uppsala University), R. Akre(Lund University), E. Bong(Lund University), P. Krejcik(Lund University), John Arthur(Lund University), S. Brennan(Lund University), K. Luening(Lund University), J. B. Hastings(Lund University)
Cited by 365Open Access
Abstract
The motion of atoms on interatomic potential energy surfaces is fundamental to the dynamics of liquids and solids. An accelerator-based source of femtosecond x-ray pulses allowed us to follow directly atomic displacements on an optically modified energy landscape, leading eventually to the transition from crystalline solid to disordered liquid. We show that, to first order in time, the dynamics are inertial, and we place constraints on the shape and curvature of the transition-state potential energy surface. Our measurements point toward analogies between this nonequilibrium phase transition and the short-time dynamics intrinsic to equilibrium liquids.
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