Physical Review Letters ( IF 8.385 ) Pub Date :
Z. Guguchia; D. Das; C. N. Wang; T. Adachi; N. Kitajima; M. Elender; F. Brückner; S. Ghosh; V. Grinenko; T. Shiroka; M. Müller; C. Mudry; C. Baines; M. Bartkowiak; Y. Koike; A. Amato; J. M. Tranquada; H. -H. Klauss; C. W. Hicks; H. Luetkens

We report muon spin rotation and magnetic susceptibility experiments on in-plane stress effects on the static spin-stripe order and superconductivity in the cuprate system with $x=0.115$. An extremely low uniaxial stress of $\sim$ 0.1 GPa induces a substantial decrease in the magnetic volume fraction and a dramatic rise in the onset of 3D superconductivity, from $\sim 10$ to 32 K; however, the onset of at-least-2D superconductivity is much less sensitive to stress. These results show not only that large-volume-fraction spin-stripe order is anti-correlated with 3D superconducting (SC) coherence, but also that these states are energetically very finely balanced. Moreover, the onset temperatures of 3D superconductivity and spin-stripe order are very similar in the large stress regime. These results strongly suggest a similar pairing mechanism for spin-stripe order, the spatially-modulated 2D and uniform 3D SC orders, imposing an important constraint on theoretical models.

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