Author(s)

Shamin Masih^*, Piyush Masih, Sarita Khandka

SHUATS, Prayagraj, India.

In the present theoretical work, superconducting order parameter (∆) and electronic specific heat (C_es) of SmOFeAs iron pnictide (IP) superconductor has been studied using multiband (MB) model of IP superconductors. Attempt has been made to use the MB structure of IP superconductors and expressions for critical temperature (T_c) and C_es are obtained, calculations being made for one, two and three bands of SmOFeAs. It has been found that MB results are close to the experimental value of T_c for this compound. C_es calculations show jump of 1.5 × 10^-5 eV/atom K, 4 × 10^-5 eV/atom K and 4 × 10^-5 eV/atom K for one, two and three band models respectively. The study brings out the importance of MB structure in IPs, highlighting the fact that increasing the number of bands, increases T_c. The specific heat jump (∆C) does not correspond to the BCS value, thereby proving that IPs are unconventional in nature.

Electronic Specific Heat, Iron Pnictide Superconductor, Multiband, Superconducting Order Parameter

Masih, S. , Masih, P. and Khandka, S. (2022) Theoretical Study on the Effect of Multiband Structure on Critical Temperature and Electronic Specific Heat in SmOFeAs Iron Pnictide Superconductor. Journal of Applied Mathematics and Physics, 10, 2232-2244. doi: 10.4236/jamp.2022.107153.