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

Z. Guguchia, D. Das, G. Simutis, T. Adachi, J. Küspert, N. Kitajima, M. Elender, V. Grinenko, O. Ivashko, M. V. Zimmermann, M. Müller, C. Mielke, F. Hotz, C. Mudry, C. Baines, M. Bartkowiak, T. Shiroka, Y. Koike, A. Amato, C. W. HicksG. D. Gu, J. M. Tranquada, H.-H. Klauss, J. J. Chang, M. Janoschek, H. Luetkens*

*Corresponding author for this work

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Abstract

The ability to efficiently control charge and spin in the cuprate high-temperature superconductors is crucial for fundamental research and underpins technological development. Here, we explore the tunability of magnetism, superconductivity, and crystal structure in the stripe phase of the cuprate La2−xBaxCuO4, with x= 0.115 and0.135, by employing temperature-dependent (down to 400 mK) muon-spin rotation and AC susceptibility, as well as X-ray scattering experiments under compressive uniaxial stress in the CuO2plane. A sixfold increase of the three-dimensional (3D)superconducting critical temperature Tc and a full recovery of the 3D phase coherence is observed in both samples with the application of extremely low uniaxial stress of∼0.1 GPa. This finding demonstrates the removal of the well-known 1/8-anomaly of cuprates by uniaxial stress. On the other hand, the spin-stripe order temperature as well as the magnetic fraction at 400 mK show only a modest decrease under stress. Moreover, the onset temperatures of 3D superconductivity and spin-stripe order are very similar in the large stress regime. However, strain produces an inhomogeneous suppression of the spin-stripe order at elevated temperatures. Namely, a substantial decrease of the magnetic volume fraction and a full suppression of the low-temperature tetragonal structure is found under stress, which is a necessary condition for the development of the 3D superconducting phase with optimal Tc. Our results evidence a remarkable cooperation between the long-range static spin-stripe order and the underlying crystalline order with the three-dimensional fully coherent superconductivity. Overall, these results suggest that the stripe- and the SC order may have a common physical mechanism.
Original languageEnglish
Article number2303423120
Number of pages9
JournalProceedings of the National Academy of Sciences
Volume121
Issue number1
DOIs
Publication statusPublished - 27 Dec 2023

Bibliographical note

Acknowledgments:
Muon spin rotation experiments were performed at the Swiss Muon Source SμS, Paul Scherrer Institute, Villigen, Switzerland. Z.G. acknowledges support from the Swiss National Science Foundation (SNSF) through SNSF Starting Grant (No. TMSGI2_211750). C.W.H. acknowledges the support of the Max Planck Society and the German Research Foundation (TRR288-422213477 ELASTO-Q-MAT, Project A10). We acknowledge Deutsches Elektronen-Synchrotron (Hamburg, Germany), a member of the Helmholtz Association, for the provision of experimental facilities. Parts of this research were carried out at PETRA III, and we would like to thank Philipp Glaevecke and Olof Gutowski for assistance in using P21.1. Beamtime was allocated for proposal I-20210503 EC. Work at Brookhaven is supported by the Office of Basic Energy Sciences, Materials Sciences and Engineering Division, U.S. Department of Energy under Contract No. DE-SC0012704. We acknowledge Prof. Yasmine Sassa for useful discussions. M.M. acknowledges financial support from the Swiss National Science Foundation under grant No. 200020_200558. H.-H.K. acknowledges support from the German Science Foundation (DFG) grant No. SFB1143.

Keywords

  • cuprate high-temperature superconductor|
  • uniaxial stress
  • stripe order
  • superconductivity
  • muon-spin rotation

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