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Showing 6 results for Researcher: Barry L. Winn

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  • ORNL Placeholder Image

    May 4, 2026

    1 MIN READ

    Non-equilibrium magnons revealed by neutrons

    Scientific Achievement: Laser pumping combined with inelastic neutron scattering reveals long-living nonequilibrium magnons in a 2D Heisenberg antiferromagnet that break detailed balance in the structure factor and form steady states under periodic driving, analogous to driven dissipative nonequilibrium systems.Significance and Impact: This work opens a previously unexplored frontier: momentum- and energy-resolved studies of dissipative quantum dynamics at milli-electron-volt energy and microsecond time scales.DOI: 10.1038/s41467-026-71068-w

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    October 4, 2024

    6 MIN READ

    ‘Neutron Nexus’ brings universities, ORNL together to advance science

    Oak Ridge National Laboratory has launched its Neutron Nexus pilot program with Florida Agricultural & Mechanical University and Florida State University through the FAMU-FSU College of Engineering. The first program of its kind nationwide, it’s aimed at broadening and diversifying the scientific user community with outreach to universities and colleges.

  • ORNL Placeholder Image

    February 23, 2023

    1 MIN READ

    Neutrons reveal key to extraordinary heat transport

    Warming a crystal of the mineral fresnoite, ORNL scientists discovered that excitations called phasons carried heat three times farther and faster than phonons, the excitations that usually carry heat through a material.

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    December 1, 2021

    1 MIN READ

    Materials – Fresh twist on heat

    A discovery by Oak Ridge National Laboratory researchers may aid the design of materials that better manage heat.

  • ORNL Placeholder Image

    October 21, 2021

    1 MIN READ

    Structural Helix Puts a Spin on Phonons

    Scientific Achievement: First-principles simulations and neutron scattering reveal conservation of hidden angular momenta for electrons and phonons in materials with structural twisting of coupled rotations and translations. Significance and Impact: Symmetry-derived global rules advance understanding of quasiparticle interactions and topologies toward discovery of materials with novel functionalities.DOI: 10.1016/j.mtphys.2021.100548

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    January 8, 2019

    1 MIN READ

    Neutrons—Quest for QSLs

    Researchers used neutron scattering at Oak Ridge National Laboratory’s Spallation Neutron Source to investigate bizarre magnetic behavior, believed to be a possible quantum spin liquid rarely found in a three-dimensional material. QSLs are exotic states of matter where magnetism continues to fluctuate at low temperatures instead of “freezing” into aligned north and south poles as with traditional magnets.