The Comparative Study of Superconducting State Parameters for Noble Metals Using Non Local Pseudopotentials
Volume: 2 - Issue: 09 - Date: 01-09-2013
Approved ISSN: 2278-1412
Published Id: IJAECESTU214 | Page No.: 257-260
Author: Vibha Vansola
Co- Author: Gunjan Shah,N. K. Bhatt, P. R. Vyas,V. B. Gohel
Abstract:-In the present study, theoretical computations of superconducting state parameters
[Electron Phonon coupling strength (λ), Coulomb pseudopotential (µ*), Transition temperature
(Tc), Isotope effect exponent (α) and Effective interaction strength (N0V)] have been carried out
using first principles pseudopotentials for noble metals. The two sets of non local
pseudopotentials, obtained with Kohn-Sham and Lindgren approximations for conduction bandcore exchange are used, while exchange due to conduction electrons are studied through Hubbard
and Singwi exchange-correlation functions respectively. The present study confirms that Lindgren
approximation is more effective than Kohn-Sham approximation for the computation of physical
properties based on form factors and energy wave number characteristic [F(q)] particularly at
small q (q<2kf), which is in agreement with assertion made by Moriarty
Key Words:-First principle pseudopotentials, superconducting state parameters, noble metals
Area:-Engineering
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