Strain-induced effect on the superconducting transition temperature of La2-xSrxCuO4 films

We investigate the strain effect on the transition temperature T-c of super conducting (001) La2-xSrxCuO4 films. Calculations show that the values of T -c of the films on SrLaAlO4 substrates under compressive strain are always higher than those on SrTiO3 under tensile strain. As the thickness reduced, the films grown on SrTiO3 substrates exhibit a rapid reduction of T-c, whe reas the T-c increases on SrLaAlO4 substrates. The theoretical results are in good agreement with experiments.