Journal Article

PUBDB-2024-00001

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Designing the stripe-ordered cuprate phase diagram through uniaxial-stress

Guguchia, Z. (Corresponding author)Extern* ; Das, D.Extern* ; Simutis, G. ; Adachi, T. ; Kuespert, J.Extern* ; Kitajima, N. ; Elender, M. ; Grinenko, V. ; Ivashko, O.Extern*DESY* ; von Zimmermann, M.DESY* ; Müller, M. ; Mielke, C.Extern* ; Hotz, F. ; Mudry, C. ; Baines, C. ; Bartkowiak, M.Extern* ; Shiroka, T. ; Koike, Y. ; Amato, A. ; Hicks, C. W. ; Gu, G. D. ; Tranquada, J. M. ; Klauss, H.-H. ; Chang, J.Extern* ; Janoschek, M.Extern* ; Luetkens, H. (Corresponding author)Extern*

2024
National Acad. of Sciences Washington, DC

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Please use a persistent id in citations: doi:10.1073/pnas.2303423120  doi:10.3204/PUBDB-2024-00001

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 La$_{2-x}$Ba$_x$CuO$_4,$ with $x$ = 0.115 and 0.135, 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 CuO$_ 2$plane. A sixfold increase of the three-dimensional (3D) superconducting critical temperature $T_c$ 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 $T_c$. 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.

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Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)
2. PETRA-D (FS-PETRA-D)

Research Program(s):

1. 632 - Materials – Quantum, Complex and Functional Materials (POF4-632) (POF4-632)
2. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
3. FS-Proposal: I-20210503 EC (I-20210503-EC) (I-20210503-EC)

Experiment(s):

1. PETRA Beamline P21.1 (PETRA III)

Appears in the scientific report 2024

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