High-resolution phonon energy shift measurements with the inelastic neutron spin echo technique


Journal Article

© 2019 International Union of Crystallography. The energy resolution of the conventional way of measuring a small change in a phonon dispersion curve using neutron scattering is restricted by the relatively coarse intrinsic resolution ellipsoid of the neutron triple-axis spectrometer (TAS). By implementing inelastic neutron spin echo on the host TAS using the Larmor precession of the neutron spin, the energy resolution of such measurements can be further improved without reducing the resolution ellipsoid. Measurements of the temperature-dependent phonon energy change are demonstrated using superconducting magneticWollaston prisms at the HB-1 instrument of the High-Flux Isotope Reactor at Oak Ridge National Laboratory, and the achievable resolution is <10 meV.

Full Text

Duke Authors

Cited Authors

  • Li, F; Shen, J; Parnell, SR; Thaler, AN; Matsuda, M; Keller, T; Delaire, O; Pynna, R; Fernandez-Baca, JA

Published Date

  • August 1, 2019

Published In

Volume / Issue

  • 52 / 4

Start / End Page

  • 755 - 760

Electronic International Standard Serial Number (EISSN)

  • 1600-5767

International Standard Serial Number (ISSN)

  • 0021-8898

Digital Object Identifier (DOI)

  • 10.1107/S1600576719008008

Citation Source

  • Scopus