Evidence for a glassy state in strongly driven carbon

Brown, C. R.; Gericke, Dirk O.; Cammarata, Marco; Cho, Bi I.; Döppner, T.; Engelhorn, K.; Förster, E.; Fortmann, C.; Fritz, David; Galtier, Eric; Glenzer, S. H.; Harmand, M.; Heimann, P.; Kugland, N. L.; Lamb, Dq Q.; Lee, Hj J.; Lee, Rw W.; Lemke, Henrik T.; Makita, Mikako; Moinard, A; Murphy, C. D.; Nagler, Bob; Neumayer, P.; Plagemann, Ku-U.; Redmer, R.; Riley, David; Rosmej, F. B.; Sperling, P.; Toleikis, S.; Vinko, S. M.; Vorberger, Jan; White, S.; White, TG; Wünsch, K.; Zastrau, U.; Zhu, Diling; Tschentscher, Thomas; Gregori, G.

doi:10.1038/srep05214

Cited by 31 publications

(16 citation statements)

References 37 publications

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“…Frequency-resolved data can probe the energy distribution of electronic states (see, e.g., Refs. [12][13][14][15][16]) while x-ray diffraction measurements mostly reveal the ionic structure [17][18][19][20][21][22]. The range of materials and conditions that can be investigated nowadays allows for a thorough test of theoretical models [23][24][25][26][27] for the electron structure in warm dense matter.…”

Section: Introductionmentioning

confidence: 99%

Ab initioapproach to model x-ray diffraction in warm dense matter

Vorberger

Gericke

2015

Phys. Rev. E

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It is demonstrated how the static electron-electron structure factor in warm dense matter can be obtained from density functional theory in combination with quantum Monte Carlo data. In contrast to theories assuming well-separated bound and free states, this ab initio approach yields also valid results for systems close to the Mott transition (pressure ionization), where bound states are strongly modified and merge with the continuum. The approach is applied to x-ray Thomson scattering and compared to predictions of the Chihara formula whereby we use the ion-ion and electron-ion structure from the same simulations. The results show significant deviations of the screening cloud from the often applied Debye-like form.

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Section: Introductionmentioning

confidence: 99%

Ab initioapproach to model x-ray diffraction in warm dense matter

Vorberger

Gericke

2015

Phys. Rev. E

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“…Mosaic cylindrical crystals from highly oriented pyrolytic graphite (HOPG) 18 in von-Hámos geometry 20 have been successfully employed in novel scattering experiments, 21 since their energy resolution matches the SASE bandwidth. When operated in seeded mode, crystals from highly annealed pyrolytic graphite (HAPG) 19 have shown to enable plasmon scattering 22 at the LCLS, but their energy resolution of E = 9 eV is still an order of magnitude worse than the seeded LCLS bandwidth.…”

Section: Principlementioning

confidence: 99%

Bent crystal spectrometer for both frequency and wavenumber resolved x-ray scattering at a seeded free-electron laser

Zastrau

Fletcher

Förster

et al. 2014

Review of Scientific Instruments

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We present a cylindrically curved GaAs x-ray spectrometer with energy resolution ∆E/E = 1.1 • 10 −4 and wave-number resolution of ∆k/k = 3 • 10 −3 , allowing plasmon scattering at the resolution limits of the Linac Coherent Light Source (LCLS) x-ray free-electron laser. It spans scattering wavenumbers of 3.6 to 5.2/ Å in 100 separate bins, with only 0.34% wavenumber blurring. The dispersion of 0.418 eV/13.5 µm agrees with predictions within 1.3%. The reflection homogeneity over the entire wavenumber range was measured and used to normalize the amplitude of scattering spectra. The proposed spectrometer is superior to a mosaic HAPG spectrometer when the energy resolution needs to be comparable to the LCLS seeded bandwidth of 1 eV and a significant range of wavenumbers must be covered in one exposure.

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“…In ref. 29 , Brown et al describe an impressive experiment at the Linac Coherent Light Source in strongly-driven carbon. A thin graphite foil was illuminated with a short optical laser pulse.…”

Section: An Example: a Strongly-coupled Graphite Plasmamentioning

confidence: 99%

Strongly-coupled plasmas formed from laser-heated solids

Lyon

Bergeson

Hart

et al. 2015

Sci Rep

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We present an analysis of ion temperatures in laser-produced plasmas formed from solids with different initial lattice structures. We show that the equilibrium ion temperature is limited by a mismatch between the initial crystallographic configuration and the close-packed configuration of a strongly-coupled plasma, similar to experiments in ultracold neutral plasmas. We propose experiments to demonstrate and exploit this crystallographic heating in order to produce a strongly coupled plasma with a coupling parameter of several hundred.

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Evidence for a glassy state in strongly driven carbon

Cited by 31 publications

References 37 publications

Ab initioapproach to model x-ray diffraction in warm dense matter

Ab initioapproach to model x-ray diffraction in warm dense matter

Bent crystal spectrometer for both frequency and wavenumber resolved x-ray scattering at a seeded free-electron laser

Strongly-coupled plasmas formed from laser-heated solids

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