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The study of slope parameter is presented for elastic proton-proton and antiproton-proton scattering with taking into account the resent experimental data at high energies. The expanded logarithmic approximations allow the description of…

High Energy Physics - Phenomenology · Physics 2015-06-19 V. A. Okorokov

The optical properties of a stack of GaN/AlN quantum discs (QDiscs) in a GaN nanowire have been studied by spatially resolved cathodoluminescence (CL) at the nanoscale (nanoCL) using a Scanning Transmission Electron Microscope (STEM)…

Materials Science · Physics 2015-02-10 L. F. Zagonel , L. Rigutti , M. Tchernycheva , G. Jacopin , R. Songmuang , M. Kociak

Nanoporosity in silicon results in an interface-dominated mechanics, fluidics and photonics that are often superior to the ones of the bulk material. However, their active control, e.g. as a response to electronic stimuli, is challenging…

Materials Science · Physics 2022-11-29 Manuel Brinker , Patrick Huber

Hydrated proteins undergo a transition in the deeply supercooled regime, which is attributed to rapid changes in hydration water and protein structural dynamics. Here, we investigate the nanoscale stress relaxation in hydrated lysozyme…

Lead-halide organic-inorganic perovskites consist of an inorganic host framework with an organic molecule occupying the interstitial space. The structure and dynamics of these materials have been heavily studied recently due to interest in…

Materials Science · Physics 2018-07-19 K. L. Brown , S. F. Parker , I. Robles Garcia , S. Mukhopadhyay , V. Garcia Sakai , C. Stock

The high-pressure and high-temperature behaviors of sodium chloride (NaCl) have the fundamental and application significance to the high pressure physics and chemistry. To explore the reactivity of NaCl at high pressure and high…

Materials Science · Physics 2019-03-29 Yu Tian , Wansheng Xiao , Yunhong He , Huifang Zhao , Feng Jiang , Dayong Tan , Ming Chen

The velocity auto-correlation spectra of simple liquids obtained by the NMR method of modulated gradient spin echo show features in the low frequency range up to a few kHz, which can be explained reasonably well by a $t^{-3/2}$ long time…

Soft Condensed Matter · Physics 2018-11-30 Janez Stepišnik , Carlos Mattea , Siegfried Stapf , Aleš Mohorič

We combine experimental and theoretical approaches to explore excited rotational states of molecules embedded in helium nanodroplets using CS$_2$ and I$_2$ as examples. Laser-induced nonadiabatic molecular alignment is employed to measure…

When a rotating neutron star loses angular momentum, the reduction of the centrifugal force makes it contract. This perturbs each fluid element, raising the local pressure and originating deviations from beta equilibrium, inducing reactions…

High Energy Astrophysical Phenomena · Physics 2015-05-18 Nicolás González-Jiménez , Cristóbal Petrovich , Andreas Reisenegger

Heating signatures from small-scale magnetic reconnection events in the solar atmosphere have proven to be difficult to detect through observations. Numerical models that reproduce flaring conditions are essential in the understanding of…

Solar and Stellar Astrophysics · Physics 2022-03-30 H. Bakke , M. Carlsson , L. Rouppe van der Voort , B. V. Gudiksen , V. Polito , P. Testa , B. De Pontieu

The present study investigates the effect of different reaction times on the crystallinity, surface morphology and size of iron oxide nanoparticles. In this synthetic system, aqueous iron (III) nitrate (Fe(NO$_3$)$_3\cdot9$H$_2$O)…

Applied Physics · Physics 2021-10-29 Ioannis Papagiannis , Mauro S. Innocente , Evangelos I. Gkanas

Probing the magnetism of the upper solar chromosphere requires measuring and modeling the scattering polarization produced by anisotropic radiation pumping in UV spectral lines. Here we apply PORTA (a novel radiative transfer code) to…

Solar and Stellar Astrophysics · Physics 2015-06-23 Jiri Stepan , Javier Trujillo Bueno , Jorrit Leenaarts , Mats Carlsson

Using an approximate time-dependent density functional theory method, we calculate the absorption and luminescence spectra for hydrogen passivated silicon nanoscale structures with large aspect ratio. The effect of electron confinement in…

Materials Science · Physics 2009-09-27 Y. Wang , R. Q. Zhang , Th. Frauenheim , T. A. Niehaus

Elastic and inelastic neutron scattering studies have been carried out on the pyrochlore magnet Ho2Ti2O7. Measurements in zero applied magnetic field show that the disordered spin ice ground state of Ho2Ti2O7 is characterized by a pattern…

Strongly Correlated Electrons · Physics 2016-08-05 J. P. Clancy , J. P. C. Ruff , S. R. Dunsiger , Y. Zhao , H. A. Dabkowska , J. S. Gardner , Y. Qiu , J. R. D. Copley , T. Jenkins , B. D. Gaulin

We study theoretically the emission and lasing properties of a single nanoshell spaser nanoparticle, or plasmonic nanolaser, made of an active core (gain material) and a plasmonic metal shell. Based on an analytical framework coupling…

Building on our earlier study, we examine the kinetic barriers to decomposition of alane, AlH$_3$, on the Si(001) surface, using the nudged elastic band (NEB) approach within DFT. We find that the initial decomposition to AlH with two H…

Materials Science · Physics 2018-03-14 Richard Smith , David R. Bowler

The electron spin-lattice relaxation of TEMPO and TEMPONE was measured at temperatures between 5 and 80 K in crystalline and glassy ethanol using X-band electron paramagnetic resonance spectroscopy. The experimental data at the lowest…

Chemical Physics · Physics 2015-05-19 Marina Kveder , Dalibor Merunka , Milan Jokić , Janja Makarević , Boris Rakvin

Lipid structures exhibit complex and highly dynamic lateral structure; and changes in lipid density and fluidity are believed to play an essential role in membrane targeting and function. The dynamic structure of liquids on the molecular…

Soft Condensed Matter · Physics 2016-12-21 Neda Dadashvand , Christina M. Othon

We have studied the power dependence of superfluid Helmholtz resonators in flat (750 and 1800 nm) rectangular channels. In the A-phase of superfluid 3He, we observe a non-linear response for velocities larger than a critical value. The…

Other Condensed Matter · Physics 2024-09-04 Alexander J. Shook , Emil Varga , Igor Boettcher , John P. Davis

Supercooled liquid and glassy acetyl salicylic acid was studied using dielectric spectroscopy and deuteron relaxometry in a wide temperature range. The supercooled liquid is characterized by major deviations from thermally activated…

Soft Condensed Matter · Physics 2009-11-11 R. Nath , T. El Goresy , H. Zimmermann , R. Bohmer