Anisotropy of the superconducting transition temperature under uniaxial pressure

The superconducting transition temperature (formula presented) is calculated as a function of uniaxial pressure along the a, b, c directions for optimally doped (formula presented) on the basis of a hole dispersion of the anisotropic (formula presented) model. There is a good qualitative agreement with experiments. We show that the uniaxial pressure effect on (formula presented) in the (formula presented) plane is due to the anisotropies of the hole dispersion and the in-plane pairing interaction, whereas the reduction of (formula presented) under uniaxial compression along the c axis mainly results from the pressure-induced increase of hole concentration of the (formula presented) plane.