Correlation between electronegativity and superconductivity
R. Asokamani, R. Manjula
DOI 10.1103/PhysRevB.39.4217 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
This paper brings out one of the striking features exhibited by all oxide superconductors. It is found the irrespective of the value of Tc, the average electronegativity χ of all the oxide superconductors found up until now lie between 2.5 and 2.65 in the Pauling’s scale and this is considered to be one of the criteria for oxide materials to be considered superconductors. This narrow range is in contrast to the elemental superconductors whose values lie in a broad range from 1.3 to 1.9. Further, the pressures required to drive some of the elemental metals to become superconductors have been calculated on the basis of their electronegativity values. The pressures so obtained agree well with the experimental observations and those calculated on the basis of band theory. The average electronegativity of A–15 Chevrel-phase superconductors are also given. Based on the concept of electronegativity the other oxide systems which are likely to become superconductors have been suggested.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Ba0.6K0.4BiO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 30 | Pressure not reported | unknown |
| Tl2Ba2Ca2Cu3O10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 125 | Pressure not reported | unknown |
Similar papers
Superconducting properties of the Ba1−xRbxBiO3 system
similarity 0.95Izumi Tomeno & Ken Ando
Source status unknown — claims are unverified
Transition temperature and a spatial dependence of the superconducting gap for multilayer high-temperature superconductors
similarity 0.95Krzysztof Byczuk & Jozef Spałek
Source status unknown — claims are unverified
Phenomenological theory for copper oxide high-Tc superconductors
similarity 0.95C. H. Eab & I. M. Tang
Source status unknown — claims are unverified
Thermodynamics of the Superconducting Phase Transition in Ba0.6K0.4BiO3
similarity 0.94P. Kumar et al.
Source status unknown — claims are unverified
Temperature dependence of positron annihilation parameters in Tl-Ba-Ca-Cu-O superconductors
similarity 0.94C. S. Sundar et al.
Source status unknown — claims are unverified
Superconducting-state thermodynamic parameters and anisotropy of HgBa2Can−1CunOy by reversible magnetization measurements
similarity 0.94R. Puźniak et al.
Source status unknown — claims are unverified