Comparison of superconductivity in Sr2RuO4 and La1.85Sr0.15CuO4 by simulations based on the BCS Theory

Superconductivity in conventional superconductors can be described by using the BCS theory, which relies on a pairing of electrons via phonon energies. In this work, we simulate the mechanisms of the BCS theory in two unconventional superconductors, La1.85Sr0.15CuO4 and Sr2RuO4, to find out whether their pairing mechanism works in a similar fashion to the BCS theory. Our results show that the differences in Fermi velocities, densities of states and spring constants of the unit cells could be a reason why both superconductors have two different critical temperatures regardless of their same crystal structure.