THERMODYNAMICAL PROPERTIES OF LiFeAs SUPERCONDUCTOR USING TWO BAND MODEL

The two band model for iron pnictide based supercond uctors is used in present work. Using G reen ’s function technique and equation of motion method, we have obtained expression for superconducting order parameter, Transition temperature, Density of state and Electronic Specific Heat. The theoretical results are then applied to LiFeAs super conductor and comparision with experimental results are made. It is found that the jump in specific heat at T c is ..., which is very close to the experimental value.... The two gap and T c are obtained which have good agreement with the experimental results. Further it is also found that interband interaction has positive effect on T c .