Study of superconducting state parameters of amorphous metals by a pseudopotential theory

• Authors: Aditya Vora
• Languages of publication: EN

Abstracts

EN

The theoretical computation of the superconducting state parameters (SSP) viz; electron-phonon coupling strength λ, Coulomb pseudopotential μ
*, transition temperature T
c, isotope effect exponent α and effective interaction strength N
O
V of some monovalent (Cu and Au), divalent (Ca, Sr, Ba, αHg, βHg and Ra) and polyvalent (Lu, Rh, Sc, Y, La, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Ac, Th, Hf, Ru, Os, Ir, V, Ta, Pa, Cr, Mo, U, Re, Np and Pu) amorphous metals based on the different groups of the periodic table have been carried out for the first time using the well known Ashcroft’s empty core (EMC) model pseudopotential. Herein, we have employed five different types of local field correction functions proposed by Hartree (H), Taylor (T), Ichimaru-Utsumi (IU), Farid et al. (F) and Sarkar et al. (S) to study the exchange and correlation effects on the present investigations. A very strong influence of all the exchange and correlation functions have been observed in the present study. Our results are in fair agreement with documented theoretical as well as experimental data. A strong dependency of the SSP of amorphous metals on the valency Z was found.

Keywords

EN

pseudopotential; super conducting state parameters; amorphous metals

Discipline

• 61.43.Dq: Amorphous semiconductors, metals, and alloys
• 71.15.Dx: Computational methodology (Brillouin zone sampling, iterative diagonalization, pseudopotential construction)
• 74.20.-z: Theories and models of superconducting state
• 74.70.Ad: Metals; alloys and binary compounds (including A15, MgB2, etc.)

• Publisher: De Gruyter Open
• Journal: Open Physics
• Year: 2008
• Volume: 6
• Issue: 2
• Pages: 263-276

Dates

published

1 - 6 - 2008

online

26 - 3 - 2008

Contributors

author

Aditya Vora

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Identifiers

DOI

10.2478/s11534-008-0023-3