Designing the stripe-ordered cuprate phase diagram through uniaxial-stress

Understanding the degree to which charge-stripe, spin-stripe, and superconducting orders compete/coexist is paramount for elucidating the microscopic pairing mechanism in the cuprate high-temperature superconductors. We explore the tunability of magnetism, superconductivity, and crystal structure in the stripe phase of the cuprate La2−xBaxCuO4, by employing complementary techniques under compressive uniaxial stress in the CuOplane. Our results show a sixfold increase of the three-dimensional(3D) superconducting critical temperature Tc with the application of extremely low uniaxial stress of about 0.1 GPa and evidence a remarkable cooperation between the static spin-stripe order and the underlying crystalline order with the 3D superconductivity. Our results suggest that the underlying pairing mechanisms are essentially the same in the alternative superconducting states with and without spin-stripe order.

Facility: SμS

Reference: Z. Guguchia et al, PNAS 121, e2303423120 (2023)

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