Effect of pressure on the behavior of nontransition metallic superconductors |
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Authors: | R Sharma K S Sharma L Dass |
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Institution: | (1) Department of Physics, M. S. J. College, 321 001 Bharatpur, India;(2) University of Rajashtan, 302 004 Jaipur, India |
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Abstract: | An explicit expression has been derived for the volume dependence of electron-phonon coupling strength () by using a recently proposed quadratic form of the screened pseudopotential and by considering the variation of Fermi momentum with volume. Variation of Coulomb pseudopotential (
*) has also been explicitly considered by varying the Fermi momentum. Dependence of transition temperatureT
c
and the logarithm of the effective interaction strength (N
0
V) on the volume has been studied for eight nontransition metallic superconductors. A linear drop inT
c
for small values of (–/
0) as well as the calculated values of= InN
0
V/ In, exhibits better matching with the experimental data, as compared to the earlier theoretical results. |
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Keywords: | |
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