Université de Sherbrooke

About: Université de Sherbrooke is a education organization based out in Sherbrooke, Quebec, Canada. It is known for research contribution in the topics: Population & Receptor. The organization has 14922 authors who have published 28783 publications receiving 792511 citations. The organization is also known as: Universite de Sherbrooke & Sherbrooke University.

Progress and perspectives on electron-doped cuprates

Abstract: Although the vast majority of high-$T_c$ cuprate superconductors are hole-doped, a small family of electron-doped compounds exists. Under investigated until recently, there has been tremendous recent progress in their characterization. A consistent view is being reached on a number of formerly contentious issues, such as their order parameter symmetry, phase diagram, and normal state electronic structure. Many other aspects have been revealed exhibiting both their similarities and differences with the hole-doped compounds. This review summarizes the current experimental status of these materials, with a goal to providing a snapshot of our current understanding of electron-doped cuprates. When possible we put our results in the context of the hole-doped compounds. We attempt to synthesize this information into a consistent view on a number of topics important to both this material class as well as the overall cuprate phenomenology including the phase diagram, the superconducting order parameter symmetry, phase separation, pseudogap effects, the role of competing orders, the spin-density wave mean-field description of the normal state, and electron-phonon coupling.

Axial Testing of Rectangular Column Models Confined with Composites

Abstract: Recent evaluation of civil engineering infrastructure has demonstrated that most of it will need major repairs in the near future. This justifies the development of innovative rehabilitation and strengthening methods for reinforced concrete structures, especially with composite materials. One of these techniques consists of strengthening columns by confinement with a composite enclosure. This paper reports the results of a research program on this topic and concentrates on the behavior of square and rectangular columns confined with carbon and aramid fiber sheets. Results from a series of tests on small-scale specimens showed that confinement increased the strength and ductility of the concrete columns loaded axially.

Sub-laser-cycle electron pulses for probing molecular dynamics.

Abstract: Experience shows that the ability to make measurements in any new time regime opens new areas of science Currently, experimental probes for the attosecond time regime (10-18–10-15 s) are being established The leading approach is the generation of attosecond optical pulses by ionizing atoms with intense laser pulses This nonlinear process leads to the production of high harmonics during collisions between electrons and the ionized atoms The underlying mechanism implies control of energetic electrons with attosecond precision We propose that the electrons themselves can be exploited for ultrafast measurements We use a ‘molecular clock’, based on a vibrational wave packet in H2+ to show that distinct bunches of electrons appear during electron–ion collisions with high current densities, and durations of about 1 femtosecond (10-15 s) Furthermore, we use the molecular clock to study the dynamics of non-sequential double ionization