Understanding the Complex Phase Diagram of Uranium: The Role of Electron-Phonon 
Coupling

Raymond, S.; Bouchet, J.; Lander, G. H.; Le Tacon, M.; Garbarino, G.; Hoesch, M.; Rueff, J. P.; Krisch, M.; Lashley, J. C.; Schulze, R. K.; Albers, R. C.

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Understanding the Complex Phase Diagram of Uranium: The Role of Electron-Phonon Coupling

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Le Tacon, M.
Solid State Spectroscopy, Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Raymond, S., Bouchet, J., Lander, G. H., Le Tacon, M., Garbarino, G., Hoesch, M., et al. (2011). Understanding the Complex Phase Diagram of Uranium: The Role of Electron-Phonon Coupling. Physical Review Letters, 107(13): 136401.

Cite as: https://hdl.handle.net/21.11116/0000-000E-BE65-B

Abstract

We report an experimental determination of the dispersion of the soft phonon mode along [100] in uranium as a function of pressure. The energies of these phonons increase rapidly, with conventional behavior found by 20 GPa, as predicted by recent theory. New calculations demonstrate the strong pressure (and momentum) dependence of the electron-phonon coupling, whereas the Fermi-surface nesting is surprisingly independent of pressure. This allows a full understanding of the complex phase diagram of uranium and the interplay between the charge-density wave and superconductivity.