Role of two-dimensional electronic state in superconductivity in La22xSrxCuO4
PhysRevB_61_107.pdf 199 KB
We have measured out-of-plane resistivity ρc for La2-xSrxCuO4 under anisotropic pressure, c-axis compression, which decreases ρc, reduces Tc drastically, whereas c-axis extension, which increases ρc, enhances Tc from 38 K at ambient pressure to 51.6 K at 8 GPa. We find that the variation of Tc scales as a function of ρc, and that the c-axis pressure coefficient is much stronger than the ab-axis one. These findings imply that Tc depends primarily on the interlayer, rather than the in-plane, lattice parameter.
Physical Review B - Condensed Matter and Materials Physics
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Graduate School of Advanced Sciences of Matter