Specifc Heat and Thermodynamic Critical Field for Calcium under the Pressure at 120 GPa

Details Specifc Heat and Thermodynamic Critical Field for Calcium under the Pressure at 120 GPa Specifc Heat and Thermodynamic Critical Field for Calcium under the Pressure at 120 GPa

2011-05-26

arxiv.org/abs/1105.5345v1

Modern Physics Letters B, Vol. 26, No. 8 (2012) 1250050 (7 pages)

Physics

Condensed Matter

Superconductivity

3 pages, 4 figures

Scientific paper

10.1142/S0217984912500509

The free energy difference between the superconducting and normal state for Calcium under the pressure at 120 GPa has been determined. The numerical calculations have been made in the framework of the imaginary axis Eliashberg approach. On the basis of the obtained results the specific heat in the superconducting C^{S}(T) and normal C^{N}(T) state, as well as, the thermodynamic critical field H_{C}(T) have been obtained. It has been shown that the characteristic values of the considered thermodynamic quantities do not obey the BCS universal laws. In particular, {\Delta}C(T_{C})/C^N(T_{C})=2.48 and T_{C}C^{N}(T_{C})/H_{C}^{2}(0)=0.154.

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