Superconducting state parameters of La100-C
GaC binary metallic glasses

• Authors: Aditya Vora
• Languages of publication: EN

Abstracts

EN

The theoretical investigations 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 six binary La100-C
GaC (C = 16, 20, 22, 24, 26 and 28 at. %) metallic glasses have been reported using Ashcroft’s empty core (EMC) model potential for the first time. Five local field correction functions proposed by Hartree (H), Taylor (T), Ichimaru-Utsumi (IU), Farid et al. (F) and Sarkar et al. (S) are used in the present investigation to study the screening influence on the aforesaid properties. It is observed that the electron-phonon coupling strength λ and the transition temperature T
C are quite sensitive to the selection of the local field correction functions, whereas the Coulomb pseudopotential μ*, isotope effect exponent α and effective interaction strength N
O
V show weak dependences on the local field correction functions. The T
C obtained from H-local field correction function are found in qualitative agreement with available experimental data and show almost linear nature with the concentration (C) of ‘Ga’ element. A linear T
C equation is proposed by fitting the present outcomes for H-local field correction function, which is in conformity with other results for the experimental data. Also, the present results are found to be in qualitative agreement with other such earlier reported data, which confirms the superconducting phase in the metallic glasses.

Keywords

EN

seudopotential; superconducting state parameters; binary metallic glasses

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: 253-262

Dates

published

1 - 6 - 2008

online

26 - 3 - 2008

Contributors

author

Aditya Vora

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Identifiers

DOI

10.2478/s11534-008-0055-8