The lattice parameters and thermal displacements in the γ → α phase transition of Ce was investigated for. Using the framework of electron-phonon coupling, it was observed that the bulk modulus follows a power-law pressure dependence. The energy for the phase transition was provided by the kinetic energy of the itinerant f electron. the results show that in addition to electronic and spin instabilities, lattice dynamics and electron-phonon coupling are essential elements for the study of the γ → α phase transition in elemental Ce.
Bibliographical noteFunding Information:
We gratefully acknowledge discussions with Y. Bang, D. Hatch, A. C. Lawson, P. Riseborough, J. Lawrence, J. M. Wills, and are thankful to A. C. L. and S. Short for helping with the data collection. The work at LANL was carried out under the auspices of the U.S. DOE/Office of Science. The data were collected at LANSCE (LANL), IPNS (ANL), and the NSLS (BNL), which are supported by the U.S. Department of Energy.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)