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Velocity of sound and the BCS interaction parameter in five body-centred-cubic crystals

Matthai, Clarence Cherian and March, N. H. 2008. Velocity of sound and the BCS interaction parameter in five body-centred-cubic crystals. Superconductor Science and Technology 21 (1) , 015012. 10.1088/0953-2048/21/01/015012

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Abstract

We first relate empirically the superconducting transition temperature, Tc, of the bcc d-band metals to the velocity of sound and the reduced Cauchy discrepancy c* = (c12−c44)/(c12+c44). Then, to be definite, by restricting ourselves to the BCS formula for Tc, we relate the BCS electron–phonon interaction to the Debye temperature and the sound velocity. By contrast the six fcc metals with both filled (Cu, Ag, Au) and incomplete (Ni, Pd, Pt) d-shells, which are not superconducting at room temperature, do not display any such relationship and instead show trends in their elastic constants consistent with the bond-charge model

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Publisher: IOP
ISSN: 0953-2048
Last Modified: 04 Jun 2017 02:00
URI: http://orca.cf.ac.uk/id/eprint/7326

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