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Electron-phonon coupling mechanisms for hydrogen-rich metals at high pressure.
- Source :
-
Physical Review B . 9/8/2017, Vol. 96 Issue 10, p1-1. 1p. - Publication Year :
- 2017
-
Abstract
- The mechanisms for strong electron-phonon coupling predicted for hydrogen-rich alloys with high superconducting critical temperature (Tc) are examined within the Migdal-Eliashberg theory. Analysis of the functional derivative of Tc with respect to the electron-phonon spectral function shows that at low pressures, when the alloys often adopt layered structures, bending vibrations have the most dominant effect. At very high pressures, the H-H interactions in two- and three-dimensional extended structures are weakened, resulting in mixed bent (libration) and stretch vibrations, and the electron-phonon coupling process is distributed over a broad frequency range leading to very high Tc. [ABSTRACT FROM AUTHOR]
- Subjects :
- *ELECTRON-phonon interactions
*HYDROGEN
*ALLOYS
Subjects
Details
- Language :
- English
- ISSN :
- 24699950
- Volume :
- 96
- Issue :
- 10
- Database :
- Academic Search Index
- Journal :
- Physical Review B
- Publication Type :
- Academic Journal
- Accession number :
- 125514427
- Full Text :
- https://doi.org/10.1103/PhysRevB.96.100502