Superconductivity in lithium, potassium, and aluminum under extreme pressure: a first-principles study

Profeta, G. and Franchini, C. and Lathiotakis, N. N. and Floris, A. and Sanna, A. and Marques, M. A. L. and Lüders, M. and Massidda, S. and Gross, E. K. U. and Continenza, A. (2006) Superconductivity in lithium, potassium, and aluminum under extreme pressure: a first-principles study. Physical Review Letters, 96 (4). ISSN 0031-9007

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Item Type:Article
Item Status:Live Archive

Abstract

Extreme pressure strongly affects the superconducting properties of “simple” elemental metals, such as Li, K, and Al. Pressure induces superconductivity in Li (as high as 17 K) while suppressing it in Al. We report first-principles investigations of the superconducting properties of dense Li, K, and Al based on a recently proposed, parameter-free, method. Our results show an unprecedented agreement with experiments, assess the predictive power of the method over a wide range of densities and electron-phonon couplings, and provide predictions for K, where no experiments exist so far. More importantly, our results help uncover the physics of the different behaviors of Li and Al in terms of phonon softening and Fermi surface nesting in Li.

Keywords:Superconductivity
Subjects:F Physical Sciences > F321 Solid state Physics
Divisions:College of Science > School of Mathematics and Physics
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ID Code:22808
Deposited On:05 Jun 2016 21:20

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