Phonon anomalies and linewidths in Nb at 10 K

Journal Article · Thu May 15 04:00:00 EDT 1986 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.33.6771· OSTI ID:5760376

Wakabayashi, N

The phonon linewidths in Nb at 10 K have been measured in detail by neutron scattering techniques. The results are in good agreement with the theoretical values of the first-principles calculation by Butler et al. The contributions of electron-phonon interactions to the observed linewidths as well as to the anomalies in the phonon-dispersion curves are discussed on the basis of a phenomenological charge-fluctuation model. In addition, strong temperature dependences of the longitudinal-mode frequencies were detected. They are interpreted as indications of a large temperature dependence of the coupling between the monopolar charge fluctuations and atomic displacements.

• Research Organization: Solid State Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 and Department of Physics, Keio University, Yokohama 223 Japan
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 5760376
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 33:10; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
COHERENT SCATTERING
DATA
DIFFRACTION
DISPERSION RELATIONS
ELECTRIC CHARGES
ELECTRON-PHONON COUPLING
ELEMENTS
EXPERIMENTAL DATA
FLUCTUATIONS
INFORMATION
LINE WIDTHS
METALS
NEUTRON DIFFRACTION
NIOBIUM
NUMERICAL DATA
PHONONS
QUASI PARTICLES
SCATTERING
TEMPERATURE DEPENDENCE
TRANSITION ELEMENTS
ULTRALOW TEMPERATURE
VARIATIONS