Skip to main content

Electron-phonon interactions and high-temperature thermodynamics of vanadium and its alloys

Publication ,  Journal Article
Delaire, O; Kresch, M; Muñoz, JA; Lucas, MS; Lin, JYY; Fultz, B
Published in: Physical Review B - Condensed Matter and Materials Physics
June 25, 2008

Inelastic neutron scattering was used to measure the phonon densities of states (DOSs) for pure V and solid solutions of V with 6 to 7at% of Co, Nb, and Pt, at temperatures from 10 K to 1323 K. Ancillary measurements of heat capacity and thermal expansion are reported on V and V-7at%Co and used to help identify the different sources of entropy. Pure V exhibits an anomalous anharmonic stiffening of phonons with increasing temperature. This anharmonicity is suppressed by Co and Pt, but not by isoelectronic Nb solutes. The changes in phonon frequency with alloying and with temperature both correlate to the decrease in electron density of states (DOS) at the Fermi level as calculated using density functional theory. The effects of both temperature and alloying can be understood in terms of an adiabatic electron-phonon interaction (EPI), which broadens sharp features in the electron DOS. These results show that the adiabatic EPI can influence the phonon thermodynamics at temperatures exceeding 1000 K, and that thermal trends of phonons may help assess the strength of the EPI. © 2008 The American Physical Society.

Duke Scholars

Published In

Physical Review B - Condensed Matter and Materials Physics

DOI

EISSN

1550-235X

ISSN

1098-0121

Publication Date

June 25, 2008

Volume

77

Issue

21

Related Subject Headings

  • Fluids & Plasmas
  • 09 Engineering
  • 03 Chemical Sciences
  • 02 Physical Sciences
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Delaire, O., Kresch, M., Muñoz, J. A., Lucas, M. S., Lin, J. Y. Y., & Fultz, B. (2008). Electron-phonon interactions and high-temperature thermodynamics of vanadium and its alloys. Physical Review B - Condensed Matter and Materials Physics, 77(21). https://doi.org/10.1103/PhysRevB.77.214112
Delaire, O., M. Kresch, J. A. Muñoz, M. S. Lucas, J. Y. Y. Lin, and B. Fultz. “Electron-phonon interactions and high-temperature thermodynamics of vanadium and its alloys.” Physical Review B - Condensed Matter and Materials Physics 77, no. 21 (June 25, 2008). https://doi.org/10.1103/PhysRevB.77.214112.
Delaire O, Kresch M, Muñoz JA, Lucas MS, Lin JYY, Fultz B. Electron-phonon interactions and high-temperature thermodynamics of vanadium and its alloys. Physical Review B - Condensed Matter and Materials Physics. 2008 Jun 25;77(21).
Delaire, O., et al. “Electron-phonon interactions and high-temperature thermodynamics of vanadium and its alloys.” Physical Review B - Condensed Matter and Materials Physics, vol. 77, no. 21, June 2008. Scopus, doi:10.1103/PhysRevB.77.214112.
Delaire O, Kresch M, Muñoz JA, Lucas MS, Lin JYY, Fultz B. Electron-phonon interactions and high-temperature thermodynamics of vanadium and its alloys. Physical Review B - Condensed Matter and Materials Physics. 2008 Jun 25;77(21).

Published In

Physical Review B - Condensed Matter and Materials Physics

DOI

EISSN

1550-235X

ISSN

1098-0121

Publication Date

June 25, 2008

Volume

77

Issue

21

Related Subject Headings

  • Fluids & Plasmas
  • 09 Engineering
  • 03 Chemical Sciences
  • 02 Physical Sciences