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The nonlinear photoacoustic response of indium phosphide nanocrystals on silicon nanotip arrays is investigated using time-resolved optical pump-probe spectroscopy and synchrotron-based X-ray diffraction. Femtosecond laser excitation…

Local dielectric spectroscopy is performed to study how relaxation dynamics of a poly-vinyl-acetate ultra-thin film is influenced by inorganic nano-inclusions of a layered silicate (montmorillonite). Dielectric loss spectra are measured by…

Magnesium atoms fully embedded in helium nanodroplets are exposed to two-color laser pulses, which trigger multiphoton above-threshold ionization (ATI). This allows to exemplarily study the contribution of a dense, neutral and finite medium…

Atomic and Molecular Clusters · Physics 2022-01-19 B. Krebs , V. A. Tulsky , L. Kazak , M. Zabel , D. Bauer , J. Tiggesbäumker

We propose a model of a heterogeneous glass forming liquid and compute the low-temperature behavior of a tagged molecule moving within it. This model exhibits stretched-exponential decay of the wavenumber-dependent, self intermediate…

Materials Science · Physics 2009-11-13 J. S. Langer , S. Mukhopadhyay

Significant influence of aerogel surface heterogeneity on the processes of 3He nuclear magnetic relaxation at temperatures 1.5 - 4.2 K is discovered. This influence appears, for instance, in differences of 3He T1 relaxation times for small…

Other Condensed Matter · Physics 2010-12-14 E. M. Alakshin , R. R. Gazizulin , A. V. Klochkov , V. V. Kuzmin , M. S. Tagirov , D. A. Tayurskii

The Spin Asymmetries of the Nucleon Experiment (SANE) measured two double spin asymmetries using a polarized proton target and polarized electron beam at two beam energies, 4.7 GeV and 5.9 GeV. A large-acceptance open-configuration detector…

We have performed quantum Monte Carlo simulations measuring the finite size and temperature superfluid response of helium-4 to the linear and rotational motion of the walls of a nanopore. Within the two-fluid model, the portion of the…

Mesoscale and Nanoscale Physics · Physics 2013-09-04 B. Kulchytskyy , G. Gervais , A. Del Maestro

In a semiconductor heterostructure with type II energy band alignment, the spatial separation between electrons and holes slows down their radiative recombination. With increasing excitation intensity, Auger recombination quickly becomes…

Materials Science · Physics 2008-09-09 E. -K. Lee , D. J. Lockwood , J. -M. Baribeau , A. M. Bratkovsky , T. I. Kamins , L. Tsybeskov

Through molecular dynamics simulations, we examined hydrodynamic behavior of the Brownian motion of fullerene particles based on molecular interactions. The solvation free energy and the velocity autocorrelation function (VACF) were…

Soft Condensed Matter · Physics 2019-05-31 Keisuke Mizuta , Yoshiki Ishii , Kang Kim , Nobuyuki Matubayasi

The forward and backward scattering off linear systems with discrete rotational symmetries R_z (2{\pi} /n) with n $\ge$ 3 are shown to be restricted by symmetry reasons. Along the symmetry axis, forward scattering can only be helicity…

Optics · Physics 2013-11-28 Ivan Fernandez-Corbaton

We performed rheological measurements of the typical deep eutectic solvents (DESs) glyceline, ethaline, and reline in a very broad temperature and dynamic range, extending from the low-viscosity to the high-viscosity supercooled-liquid…

Soft Condensed Matter · Physics 2021-04-26 D. Reuter , P. Münzner , C. Gainaru , P. Lunkenheimer , A. Loidl , R. Böhmer

Aims. We aim to elucidate the spectral changes in the 3 micron region that result from chemical changes in the molecular periphery of polycyclic aromatic hydrocarbons (PAHs) with extra hydrogens (H-PAHs) and methyl groups (Me-PAHs).…

Astrophysics of Galaxies · Physics 2018-04-04 E. Maltseva , C. J. Mackie , A. Candian , A. Petrignani , X. Huang , T. J. Lee , A. G. G. M. Tielens , J. Oomens , WJ Buma

Coherent grazing-incidence small-angle X-ray scattering is used to investigate the average kinetics and the fluctuation dynamics during self-organized nanopatterning of silicon by Ar$^+$ bombardment at 65$^{\circ}$ polar angle. At early…

We report elastic and inelastic neutron scattering experiments on different amorphous ice modifications. It is shown that an amorphous structure (HDA') indiscernible from the high-density phase (HDA), obtained by compression of crystalline…

Disordered Systems and Neural Networks · Physics 2009-11-11 Michael Marek Koza , Burkhard Geil , Katrin Winkel , Christian Koehler , Franz Czeschka , Marco Scheuermann , Helmut Schober , Thomas Hansen

We integrate for the first time the hydrodynamic Hall-Vinen-Bekarevich-Khalatnikov equations of motion of a $^{1}S_{0}$-paired neutron superfluid in a rotating spherical shell, using a pseudospectral collocation algorithm coupled with a…

Astrophysics · Physics 2009-11-13 C. Peralta , A. Melatos , M. Giacobello , A. Ooi

Attosecond charge migration is a periodic evolution of the charge density of a molecule on a time scale defined by the energy intervals between the electronic states involved. Here, we report the observation of charge migration in neutral…

The temperature evolution of spin relaxation time, {\tau}sf, in degenerate silicon (Si)-based lateral spin valves is investigated by means of the Hanle effect measurements. {\tau}sf at 300 K is estimated to be 1.68+-0.03 ns and…

Ammonia is one of the most widely observed molecules in space, and many observations are able to resolve the hyperfine structure due to the electric quadrupole moment of the nitrogen nucleus. The observed spectra often display anomalies in…

Astrophysics of Galaxies · Physics 2023-09-06 J. Loreau , A. Faure , F. Lique , S. Demes , P. J. Dagdigian

In superconductors on triangle lattices, we show that the electronic Raman spectra in the non-resonant channel are independent of the light polarization configuration in the scattering. Therefore the light polarization configuration is no…

Superconductivity · Physics 2009-11-11 Jian-Bo Wang , Xiang-Mei He , Fei Tan , Qiang-Hua Wang

We studied the rheological behavior of a molecular solution composed of $\alpha$-cyclodextrin, water and 4-methylpyridine, a liquid known to undergo inverse melting, at different temperatures and concentrations. The system shows a marked…

Soft Condensed Matter · Physics 2009-09-17 R. Angelini , G. Salvi , G. Ruocco