Showing 8 results for Author: Jon C. Leiner
Jul, 2026
Journal
The Laue neutron macromolecular crystallography beamline IMAGINE at the High Flux Isotope Reactor (HFIR) is undergoing a major upgrade to incorporate the Dynamic Nuclear Polarization (DNP) technique. Upon completion, the new IMGAINE-X instrument is expected to enhance the signal-to-noise ratio of the diffraction data by an order of magnitude. To take full advantage of the…
Mar, 2025
Journal
The Goos-Hänchen (GH) shift describes a phenomenon in which a specularly reflected beam is translated along the reflecting surface such that the incident and reflected rays no longer intersect at the surface. Using a neutron spin-echo technique and a specially designed magnetic multilayer mirror, we have measured the relative phase between the reflected up and down neutron…
Sep, 2024
Journal
Intraparticle entanglement of individual particles such as neutrons could enable another class of scattering probes that are sensitive to entanglement in quantum systems and materials. In this work, we present experimental results demonstrating quantum contextuality as a result of entanglement between the spin and energy modes (i.e., degrees of freedom) of single neutrons…
Sep, 2024
ORNL Report
Nov, 2016
Journal
Using inelastic neutron scattering, we map a 14 meV coherent resonant mode in the topological Kondo insulator SmB6 and describe its relation to the low energy insulating band structure. The resonant intensity is confined to the X and R high symmetry points, repeating outside the first Brillouin zone and dispersing less than 2 meV, with a 5d-like magnetic form factor. We pr…
Mar, 2015
Journal
Using inelastic neutron scattering, we map a 14 meV resonant mode in SmB6 and describe its relation to the low energy insulating band structure. The resonant intensity is sharply conned to the X and R high symmetry points and disperses less than 2 meV through the zone. Repeating outside the rst Brillouin zone, the mode is coherent with a 5d-like magnetic form factor. We…
Sep, 2014
Journal
Neutron Scattering is used to probe magnetic interactions as superconductivity develops in opti- mally doped Fe_(1+δ)Se_xTe_(1−x). Applying the first moment sum-rule to comprehensive neutron scatter- ing data, we extract the change in magnetic exchange energy ∆[J_(R-R′) ⟨S_R ·S_R′ ⟩] in the superconducting state referenced to the normal state. Oscillatory changes are obser…