Chalk River Laboratories

About: Chalk River Laboratories is a based out in . It is known for research contribution in the topics: Neutron diffraction & Neutron scattering. The organization has 2297 authors who have published 2700 publications receiving 73287 citations.

First-Order Melting of a Weak Spin-Orbit Mott Insulator into a Correlated Metal.

Abstract: The electronic phase diagram of the weak spin-orbit Mott insulator (${\mathrm{Sr}}_{1\ensuremath{-}x}{\mathrm{La}}_{x}{)}_{3}{\mathrm{Ir}}_{2}{\mathrm{O}}_{7}$ is determined via an exhaustive experimental study. Upon doping electrons via La substitution, an immediate collapse in resistivity occurs along with a narrow regime of nanoscale phase separation comprised of antiferromagnetic, insulating regions and paramagnetic, metallic puddles persisting until $x\ensuremath{\approx}0.04$. Continued electron doping results in an abrupt, first-order phase boundary where the N\'eel state is suppressed and a homogenous, correlated, metallic state appears with an enhanced spin susceptibility and local moments. As the metallic state is stabilized, a weak structural distortion develops and suggests a competing instability with the parent spin-orbit Mott state.

The study of liposomes, lamellae and membranes using neutrons and X-rays

Abstract: Advances in colloid and interface science have stimulated a renewed interest in the study of lipid–water systems. In recent years, much progress has been achieved in the domains of sample preparation and sample environments, offering the unique possibility of studying these systems under physiologically relevant conditions. In the case of neutron reflectometry, new experimental protocols allow for the unique structural determination of one-dimensional membrane profiles, while the advantages offered by synchrotron radiation (e.g., high flux and spatial resolution) make X-rays an excellent tool for addressing questions pertaining to membrane interactions. Most recently, holographic techniques are evolving so that one day they may be able to resolve, to atomic resolution, the structure of poorly crystallized membrane associated proteins.

The magnetic structure of

Abstract: We have determined the magnetic structure of the Fe sublattice in by high-resolution neutron powder diffraction. The crystal space group is Cmcm and the magnetic space group is . The Fe modes are and at the 8d, 8e and 8g sites, respectively. The easy direction of magnetization is [100] and the propagation vector is [010].