Publication
Title
Phenomenology of the superconducting transition temperatures of pure metals, and specially those not showing isotope effects
Author
Abstract
We consider a group of five transition metals all having a bcc structure. Their superconductivity transition temperatures, as pointed out a long time ago by Ledbetter, correlate well with the Cauchy discrepancy in their elastic constants. The absence of any measurable isotope effect distinguishes them from conventional Bardeen-Cooper-Schriefer (BCS) superconductors, which seems the major difficulty in front of a first principle theory of the Tc in those materials. Nevertheless, it remains to be studied a phenomenological connection of Tc with the Debye temperature. The BCS theory precisely describes for these materials the properties determined by broken symmetry requirements, but not Tc. Here we show that Tc is much less sensitive to TD than in BCS conductors. This conclusion seems coherent with the lack of isotope effects in these materials. The analysis leads us to propose a possible mechanism for the existing link between Tc and the Cauchy discrepancy.
Language
English
Source (journal)
Physics and chemistry of liquids. - London
Publication
London : 2016
ISSN
0031-9104
Volume/pages
54:1(2016), p. 137-140
ISI
000365724100014
Full text (Publisher's DOI)
Full text (publisher's version - intranet only)
UAntwerpen
Faculty/Department
Research group
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identification
Creation 15.01.2016
Last edited 13.08.2017
To cite this reference