Figure 2
The dependence of the order parameter on temperature. The insets present the influence of temperature on the value of effective electron mass to the band electron mass ratio. Blue or red disks represent numerical results. Black curves were obtained from the analytical formulae: \(\Delta \left(T\right)=\Delta \left({T}_{0}\right)\sqrt{1-{\left(T/{T}_{C}\right)}^{\Gamma }}\) and \({m}_{e}^{\star }/{m}_{e}=\left[Z\left({T}_{C}\right)-Z\left({T}_{0}\right)\right]{\left(T/{T}_{C}\right)}^{\Gamma }+Z\left({T}_{0}\right)\), where \(Z\left({T}_{C}\right)=1+\lambda \), Γa = 3.5 and Γb = 3.4. The predictions of the BCS theory we marked with grey circles.
