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Graphene layers are stable, hard, and relatively inert. We study how tensile stress affects $\sigma$ and $\pi$ bonds and the resulting change in the chemical activity. Stress affects more strongly $\pi$ bonds that can become chemically…

Materials Science · Physics 2015-05-13 P. L. de andres , J. A. Verges

We report emergence of photoluminescence at room temperature in trigonal $Cs_3Bi_2Br_9$ at high pressures. Enhancement in intensity with pressure is found to be driven by increase in distortion of $BiBr_6$ octahedra and iso-structural…

The design and evaluation on the NSLS-II beamline of the 3FI application specific integrated circuit (ASIC) bump-bonded to a simply, planar, two-dimensionally segmented silicon sensor is presented. The ASIC was developed for Full-Field…

Protein$\alpha$-helices provide an ordered biological environment that is conducive to soliton-assisted energy transport. The nonlinear interaction between amide I excitons and phonon deformations induced in the hydrogen-bonded lattice of…

Biological Physics · Physics 2022-02-02 Danko D. Georgiev , James F. Glazebrook

Caesium iodide is one of the more extensively studied scintillators. Here we present X-ray luminescence spectra, scintillation light output and decay curves as function of temperature, from room temperature down to below 10 K. Features of…

Materials Science · Physics 2015-08-12 V. B. Mikhailik , V. Kapustyanyk , V. Tsybulskyi , V. Rudyk , H. Kraus

Due to their high photospheric density, cool helium-rich white dwarfs (particularly DZ, DQpec and ultracool) are often poorly described by current atmosphere models. As part of our ongoing efforts to design atmosphere models suitable for…

Solar and Stellar Astrophysics · Physics 2016-10-05 Simon Blouin , Patrick Dufour , Piotr M. Kowalski

Type-I clathrate compounds have attracted a great deal of interest in connection with the search for efficient thermoelectric materials. These compounds constitute networked cages consisting of nano-scale tetrakaidecahedrons (14 hedrons)…

Materials Science · Physics 2014-06-06 Toshiro Takabatake , Koichiro Suekuni , Tsuneyoshi Nakayama , Eiji Kaneshita

We address the fundamental question of crossover from localized to itinerant state of a paradigmatic heavy fermionmaterial CeIrIn5. The temperature evolution of the one electron spectra and the optical conductivity is predicted from first…

Strongly Correlated Electrons · Physics 2009-11-13 J. H. Shim , K. Haule , G. Kotliar

The structure of the quasi two dimensional heavy fermion antiferromagnet CeRhIn$_{5}$ has been investigated as a function of pressure up to 13 GPa using a diamond anvil cell under both hydrostatic and quasihydrostatic conditions at room…

Strongly Correlated Electrons · Physics 2007-05-23 Ravhi S. Kumar , H. Kohlmann , B. E. Light , A. L. Cornelius , V. Raghavan , T. W. Darling , J. L. Sarrao

Integrated photoelasticity is investigated for a soft material subjected to a three-dimensional stress state. In the experiment, a solid sphere is pressed against a gelatin gel (Young's modulus is about 4.2 kPa) that deforms up to 4.5 mm…

The determination of a 'folding core' can help to provide insight into the structure, flexibility, mobility and dynamics, and hence, ultimately, function of a protein - a central concern of structural biology. Changes in the folding core…

Biomolecules · Quantitative Biology 2015-04-09 J. W. Heal , R. A. Römer , C. A. Blindauer , R. B. Freedman

A2Ir2O7 iridates were proven to crystallise in the geometrically frustrated pyrochlore structure, which remains stable upon rare-earth cation substitution, temperature variation, and external pressure application. However, the change of…

Strongly Correlated Electrons · Physics 2024-08-05 Daniel Staško , Petr Proschek , Jiří Prchal , Milan Klicpera

The High Intensity Heavy-Ion Accelerator Facility is a new project in the Institute of Modern Physics. The dipole magnets of all rings are conceived as fast cycled superconducting magnet with high magnetic field and large gap, the warm iron…

Instrumentation and Detectors · Physics 2015-04-20 Xiaoying Zhang , Beimin Wu , Dongsheng Ni , Yuquan Chen , Wei Wu , Lizhen Ma

In this work, we present a comparative first principles study of mechanical properties, electronic structure, phonon dispersion relation, electron-phonon coupling and magnetism in three isostructural superconductors, namely, ThFeAsN,…

Superconductivity · Physics 2021-01-04 Smritijit Sen , Guang-Yu Guo

While the {\it Helioseismic and Magnetic Imager} (HMI) onboard the {\it Solar Dynamics Observatory} (SDO) provides Doppler velocity [$V$], continuum intensity [$I_C$], and line-depth [$Ld$] observations, each of which is sensitive to the…

Solar and Stellar Astrophysics · Physics 2015-09-24 Rachel Howe , Kiran Jain , Richard S. Bogart , Deborah A. Haber , Charles S. Baldner

The study of protein interactions has generated great interest in the food industry. Therefore, research on new supramolecular structures shows promise. Supramolecular structures of the whey proteins {\alpha}-lactalbumin and…

Simulation studies of the atomic shear stress in the local potential energy minima (inherent structures) are reported for binary liquid mixtures in 2D and 3D. These inherent structure stresses are fundamental to slow stress relaxation and…

Soft Condensed Matter · Physics 2016-04-20 Sadrul Chowdhury , Sneha Abraham , Toby Hudson , Peter Harrowell

We study model protein solutions and colloidal suspensions in the temperature range whereupon the nature of the system changes from a homogeneous fluid to a "cluster fluid". It is commonly assumed - as deduced by the behavior of the…

Statistical Mechanics · Physics 2011-09-02 Jean-Marc Bomont , Jean-Louis Bretonnet , Dino Costa

Isotopic effects in spectator fragmentations following heavy-ion collisions at relativistic energies are investigated using data from recent exclusive experiments with SIS beams at GSI. Reactions of 12C on 112,124Sn at incident energies 300…

Nuclear Experiment · Physics 2008-11-26 W. Trautmann