In the present theoretical work, superconducting order parameter (∆) and electronic specific heat (C<sub>es</sub>) of SmOFeAs iron pnictide (IP) superconductor has been studied using multiband (M...In the present theoretical work, superconducting order parameter (∆) and electronic specific heat (C<sub>es</sub>) 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<sub>c</sub>) and C<sub>es</sub> 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<sub>c</sub> for this compound. C<sub>es</sub> calculations show jump of 1.5 × 10<sup>-5</sup> eV/atom K, 4 × 10<sup>-5</sup> eV/atom K and 4 × 10<sup>-5</sup> 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<sub>c</sub>. The specific heat jump (∆C) does not correspond to the BCS value, thereby proving that IPs are unconventional in nature.展开更多
文摘In the present theoretical work, superconducting order parameter (∆) and electronic specific heat (C<sub>es</sub>) 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<sub>c</sub>) and C<sub>es</sub> 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<sub>c</sub> for this compound. C<sub>es</sub> calculations show jump of 1.5 × 10<sup>-5</sup> eV/atom K, 4 × 10<sup>-5</sup> eV/atom K and 4 × 10<sup>-5</sup> 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<sub>c</sub>. The specific heat jump (∆C) does not correspond to the BCS value, thereby proving that IPs are unconventional in nature.
