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  1. No Access

    Article

    Evidence of a field-induced Berezinskii–Kosterlitz–Thouless scenario in a two-dimensional spin–dimer system

    Two-dimensional (2D) systems with continuous symmetry lack conventional long-range order because of thermal fluctuations. Instead, as pointed out by Berezinskii, Kosterlitz and Thouless (BKT), 2D systems may e...

    U. Tutsch, B. Wolf, S. Wessel, L. Postulka, Y. Tsui, H.O. Jeschke… in Nature Communications (2014)

  2. No Access

    Article

    Atomistic simulation of the laser induced damage in single wall carbon nanotubes: Diameter and chirality dependence

    The effect of high energy laser pulses on single wall carbon nanotubes (SWNT) is studied by a non-equilibrium quantum mechanical model. For the studied laser parameters, we find ablation thresholds that vary b...

    A.H. Romero, H.O. Jeschke, A. Rubio, M.E. Garcia in Applied Physics A (2004)

  3. No Access

    Article

    Laser-induced coherent phonons in graphite and carbon nanotubes: model and simulations

    We present a microscopic description of the excitation of coherent phonons as a response to femtosecond laser excitation. Using molecular dynamics simulations based on a tight-binding electronic Hamiltonian we...

    M.E. Garcia, T. Dumitrică, H.O. Jeschke in Applied Physics A (2004)

  4. No Access

    Chapter

    Ultrafast Structural Changes Induced by Femtosecond Laser Pulses

    A theoretical approach to treat laser induced femtosecond structural changes in covalent solids is described. Our approach consists in molecular dynamic simulations performed on the basis of a time-dependent, ...

    H. O. Jeschke, M. E. Garcia in Nonlinear Optics, Quantum Optics, and Ultr… (2003)

  5. No Access

    Chapter and Conference Paper

    Femtosecond laser-induced ablation of graphite

    The dynamics of fs-laser ablation of graphite has been investigated experimentally and theoretically. The experimental observation of two different ablation mechanisms is supported by molecular dynamics calcul...

    K. Sokolowski-Tinten, S. Kudryashov, V. Temnov, J. Bialkowski… in Ultrafast Phenomena XII (2001)

  6. No Access

    Article

    Theory for the ultrafast dynamics of excited clusters: interplay between elementary excitations and atomic structure

    We present a theoretical study of the short-time relaxation of clusters in response to ultrafast excitations using femtosecond laser pulses. We analyze the excitation of different types of clusters (Hgn, Agn, Sin

    M.E. Garcia, H.O. Jeschke, I. Grigorenko, K.H. Bennemann in Applied Physics B (2000)

  7. No Access

    Article

    Theory for laser-induced ultrafast phase transitions in carbon

    The response of carbon to femtosecond laser pulses of arbitrary form, different durations, and different intensities is studied theoretically. We perform molecular dynamics simulations based on a microscopic ...

    H.O. Jeschke, M.E. Garcia, K.H. Bennemann in Applied Physics A (1999)

  8. No Access

    Chapter

    Ultrafast Structural Response and Nonlinear Fragmentation Dynamics of Small Clusters Induced by Optical Excitation

    The ultrafast relaxation of small clusters immediately after ionization and photodetachment is theoretically studied. Microscopic models are proposed to describe the non-equilibrium dynamics of the clusters. A...

    M. E. Garcia, H. O. Jeschke, K. H. Bennemann in Theory of Atomic and Molecular Clusters (1999)