Formation of a new dynamical mode in α-uranium observed by inelastic x-ray and neutron scattering

M. E. Manley; M. Yethiraj; H. Sinn; H. M. Volz; A. Alatas; J. C. Lashley; W. L. Hults; G. H. Lander; J. L. Smith

doi:10.1103/PhysRevLett.96.125501

Formation of a new dynamical mode in α-uranium observed by inelastic x-ray and neutron scattering

M. E. Manley, M. Yethiraj, H. Sinn, H. M. Volz, A. Alatas, J. C. Lashley, W. L. Hults, G. H. Lander, J. L. Smith

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Abstract

Phonon dispersion curves were obtained from inelastic x-ray and neutron scattering measurements on α-uranium single crystals at temperatures from 298 to 573 K. Both measurements showed a softening and an abrupt loss of intensity in the longitudinal optic branch along [00Î¶] above 450 K. Above the same temperature a new dynamical mode of comparable intensity emerges along the [01ζ] zone boundary with energy near the top of the phonon spectrum. The new mode forms without a structural transition but coincides with an anomaly in the mechanical deformation behavior. We argue that the mode is an intrinsically localized vibration and formed as a result of a strong electron-phonon interaction.

Original language	English
Article number	125501
Journal	Physical Review Letters
Volume	96
Issue number	12
DOIs	https://doi.org/10.1103/PhysRevLett.96.125501
State	Published - 2006
Externally published	Yes

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title = "Formation of a new dynamical mode in α-uranium observed by inelastic x-ray and neutron scattering",

abstract = "Phonon dispersion curves were obtained from inelastic x-ray and neutron scattering measurements on α-uranium single crystals at temperatures from 298 to 573 K. Both measurements showed a softening and an abrupt loss of intensity in the longitudinal optic branch along [00{\^I}¶] above 450 K. Above the same temperature a new dynamical mode of comparable intensity emerges along the [01ζ] zone boundary with energy near the top of the phonon spectrum. The new mode forms without a structural transition but coincides with an anomaly in the mechanical deformation behavior. We argue that the mode is an intrinsically localized vibration and formed as a result of a strong electron-phonon interaction.",

author = "Manley, {M. E.} and M. Yethiraj and H. Sinn and Volz, {H. M.} and A. Alatas and Lashley, {J. C.} and Hults, {W. L.} and Lander, {G. H.} and Smith, {J. L.}",

year = "2006",

doi = "10.1103/PhysRevLett.96.125501",

language = "English",

volume = "96",

journal = "Physical Review Letters",

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T1 - Formation of a new dynamical mode in α-uranium observed by inelastic x-ray and neutron scattering

AU - Manley, M. E.

AU - Yethiraj, M.

AU - Sinn, H.

AU - Volz, H. M.

AU - Alatas, A.

AU - Lashley, J. C.

AU - Hults, W. L.

AU - Lander, G. H.

AU - Smith, J. L.

PY - 2006

Y1 - 2006

N2 - Phonon dispersion curves were obtained from inelastic x-ray and neutron scattering measurements on α-uranium single crystals at temperatures from 298 to 573 K. Both measurements showed a softening and an abrupt loss of intensity in the longitudinal optic branch along [00Î¶] above 450 K. Above the same temperature a new dynamical mode of comparable intensity emerges along the [01ζ] zone boundary with energy near the top of the phonon spectrum. The new mode forms without a structural transition but coincides with an anomaly in the mechanical deformation behavior. We argue that the mode is an intrinsically localized vibration and formed as a result of a strong electron-phonon interaction.

AB - Phonon dispersion curves were obtained from inelastic x-ray and neutron scattering measurements on α-uranium single crystals at temperatures from 298 to 573 K. Both measurements showed a softening and an abrupt loss of intensity in the longitudinal optic branch along [00Î¶] above 450 K. Above the same temperature a new dynamical mode of comparable intensity emerges along the [01ζ] zone boundary with energy near the top of the phonon spectrum. The new mode forms without a structural transition but coincides with an anomaly in the mechanical deformation behavior. We argue that the mode is an intrinsically localized vibration and formed as a result of a strong electron-phonon interaction.

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DO - 10.1103/PhysRevLett.96.125501

M3 - Article

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SN - 0031-9007

VL - 96

JO - Physical Review Letters

JF - Physical Review Letters

IS - 12

M1 - 125501

ER -

Formation of a new dynamical mode in α-uranium observed by inelastic x-ray and neutron scattering

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