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The effect of uniaxial pressure on superconductivity was examined for ahigh-Tc cuprate La1.64Eu0.2Sr0.16CuO4, which is located at the boundary betweenthe superconducting and stripe phases. We found remarkably large anisotropy ofthe uniaxial pressure effect not only between the in-plane and out-of-planepressures but also within the CuO2-plane. When the pressure is applied alongthe tetragonal [110] direction, we found the largest pressure effect everobserved in cuprates, dTc/dP - 2.5 K/kbar, while the change of Tc was notappreciable when applied along [100]. This substantial in-plane anisotropy isattributed to an intimate link between the symmetry of the one-dimensionalstripes and that of the strain produced within the CuO2 plane.Comment: 4 pages including 3 figure

journal of the physical society of japan

Gigantic Anisotropic Uniaxial Pressure Effect on Superconductivity within the CuO2Plane of La1.64Eu0.2Sr0.16CuO4: Strain Control of Stripe Criticality