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

被引：51

作者：

Raymond, S. ^{[1
]}

Bouchet, J. ^{[2
]}

Lander, G. H. ^{[3
]}

Le Tacon, M. ^{[4
,5
]}

Garbarino, G. ^{[4
]}

Hoesch, M. ^{[4
]}

Rueff, J. -P. ^{[6
,7
]}

Krisch, M. ^{[4
]}

Lashley, J. C. ^{[8
]}

Schulze, R. K. ^{[8
]}

Albers, R. C. ^{[8
]}

机构：

[1] UJF Grenoble 1, SPSMS, CEA INAC, UMR E 9001, F-38054 Grenoble, France

[2] CEA, DAM, DIF, F-91297 Arpajon, France

[3] Commiss European Communities, Joint Res Ctr, Inst Transuranium Elements, D-76125 Karlsruhe, Germany

[4] European Synchrotron Radiat Facil, F-38043 Grenoble, France

[5] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany

[6] Synchrotron SOLEIL, Lorme des Merisiers, F-91192 Gif Sur Yvette, France

[7] UPMC, CNRS, Lab Chim Phys Mat & Rayonnement, UMR 7614, F-75005 Paris, France

[8] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 107卷 / 13期

关键词：

HIGH-PRESSURE; METALS;

D O I：

10.1103/PhysRevLett.107.136401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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.

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页数：4

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