Understanding the Complex Phase Diagram of Uranium - the Role of the 5f States

Predictions of the phonon behaviour at high pressure are included in the recent first-principle calculation of the phonons in uranium. Experiments up to 20 GPa using inelastic x-ray scattering confirm these predictions. Extending the theory explains the complex phase diagram of uranium as a function of temperature and pressure, which includes the interplay between a charge-density wave and superconductivity. Observations extending back 40 years can be interpreted on the basis of correctly including a narrow band of 5f states and the associated strong electron-phonon coupling.

RAYMOND S.;  BOUCHET J.;  LANDER G.H.;  LE TACON M.;  GABARINO G.;  HOESCH M.;  RUEFF J.P.;  KRISCH M.;  LASHLEY J. C.;  SCHULZE R.;  ALBERS R.C.; 

2011-10-07

AMER PHYSICAL SOC

JRC60529

0031-9007,   

http://prl.aps.org/abstract/PRL/v107/i13/e136401,    https://publications.jrc.ec.europa.eu/repository/handle/JRC60529,   

10.1103/PhysRevLett.107.136401,