Theoretical investigation of superconductivity in MgB{sub 2-x}C{sub x} alloys
- Department of Physics, Govt. Dungar College Bikaner, Rajasthan (India)
In this paper we investigated the superconducting properties of MgB{sub 2-x}C{sub x} alloys where x is the concentration (0.0, 0.03, 0.11 and 0.20). The superconducting state parameters, namely, the electron-phonon coupling strength (λ), Coulomb pseudopotential (μ*), transition temperature (T{sub c}), isotope effect exponent (α) and interaction strength (N{sub o}V) of MgB{sub 2-x}C{sub x} alloys have been investigated in the BCS-Eliashberg-McMillan framework, as modified for MgB{sub 2-x}C{sub x} alloys. Pseudo ions with average properties have been considered to replace different types of ions in the system. It is observed that all the superconducting parameters go on decreasing as the concentration of C is increased. The magnitudes of λ and T{sub c} indicate that MgB{sub 2-x}C{sub x} is strong-to-intermediate coupling superconductor. It is also observed that T{sub c} is composition dependent. Present computations yield almost linear variation of T{sub c} with concentration x of C in the MgB{sub 2-x}C{sub x} system, which is in agreement with the experimental data. A linear T{sub c} equation is proposed by fitting the present results.
- OSTI ID:
- 22591273
- Journal Information:
- AIP Conference Proceedings, Vol. 1728, Issue 1; Conference: ICC 2015: International conference on condensed matter and applied physics, Bikaner (India), 30-31 Oct 2015; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
Similar Records
A comparative ab initio study of superconductivity in the body centered tetragonal YC{sub 2} and LaC{sub 2}
Characteristics of Superconducting State in Vanadium: the Eliashberg Equations and Semi-analytical Formulas
Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BORON ALLOYS
CALCULATION METHODS
CARBON ADDITIONS
CONCENTRATION RATIO
COULOMB FIELD
ELECTRON-PHONON COUPLING
INTERMEDIATE COUPLING
MAGNESIUM ALLOYS
MAGNESIUM BORIDES
SUPERCONDUCTIVITY
TRANSITION TEMPERATURE
TYPE-II SUPERCONDUCTORS