NDLI: Superconductivity in Lithium Under Pressure

Content Provider	Springer Nature Link
Author	Jishi, R. A. Benkraouda, M. Bragin, J.
Copyright Year	2007
Abstract	We use an ab initio calculation, within the framework of the density functional theory, to calculate total energy, electronic energy bands, and the phonon dispersion curves of an fcc structure of lithium as a function of the unit cell volume. We find that the fcc structure is stable starting from a reduced volume of 0.88 V$_{0}$, where V$_{0}$ is the known unit cell volume at ambient pressure and it remains so until a volume of 0.40 V$_{0}$. The electronic structure and the vibrational modes are calculated, as well as the variation of T$_{c}$ with the volume. At a reduced volume of 0.40 V$_{0}$, T$_{c}$ is calculated to be 20 K, which is in agreement with the experimental value. Our calculations indicate that superconductivity in Li under high-pressure occurs through intervalley scattering of electrons, between pockets centered at the L-points of the Brillouin zone (BZ), mediated by phonons in the vicinity of the X-points.
Starting Page	549
Ending Page	557
Page Count	9
File Format	PDF
ISSN	00222291
Journal	Journal of Low Temperature Physics
Volume Number	147
Issue Number	5-6
e-ISSN	15737357
Language	English
Publisher	Kluwer Academic Publishers-Plenum Publishers
Publisher Date	2007-03-28
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	electronic properties lithium phonons superconductivity Magnetism, Magnetic Materials Characterization and Evaluation of Materials Condensed Matter
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics Materials Science

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