Phonon dispersion of Mo-stabilized gamma-U measured using inelastic x-ray scattering

Article

关键词: GROUP-IV METALS;    ELASTIC-CONSTANTS;    LATTICE-DYNAMICS;    BCC PHASE;    CRYSTAL DYNAMICS;    TUNGSTEN;   

DOI  :  10.1103/PhysRevB.100.094311

来源: SCIE

【 摘 要 】

We have measured the room-temperature phonon spectrum of Mo-stabilized gamma-U. The dispersion curves show unusual softening near the H point, q = [1/2, 1/2, 1/2], which may derive from the metastability of the gamma-U phase or from strong electron-phonon coupling. Near the zone center, the dispersion curves agree well with theory, though significant differences are observed away from the zone center. The experimental phonon density of states is shifted to higher energy compared to theory and high-temperature neutron scattering. The elastic constants of gamma-UMo are similar to those of body-centered cubic elemental metals.

【 授权许可】

Free