Uniaxial stress study of spin and charge stripes in La1.875Ba0.125CuO4 by 139La NMR and 63Cu NQR

Scientific paper - Original scientific paper

• Author: I. Jakovac
• Author: A. P. Dioguardi
• Author: M. S. Grbić
• Author: G. D. Gu
• Author: J. M. Tranquada
• Author: C. W. Hicks
• Author: M. Požek
• Author: H.-J. Grafe
• Author's institution: University of Zagreb; Faculty of Science; (Department of Physics)
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics

Abstract (english)

We study the response of spin and charge order in single crystals of La_1.875Ba_0.125CuO_4 to uniaxial stress through 139La nuclear magnetic resonance and 63Cu nuclear quadrupole resonance, respectively. In unstressed La_1.875Ba_0.125CuO_4, the low-temperature tetragonal structure sets in below T_LTT = 57 K, while the charge order and the spin order transition temperatures are T_CO = 54 K and T_SO = 37K, respectively. We find that uniaxial stress along the [110] lattice direction strongly suppresses T_CO and T_SO, but has little effect on T_LTT. In other words, under stress along [110] a large splitting (≈21 K) opens between T_CO and T_LTT, showing that these transitions are not tightly linked. On the other hand, stress along [100] causes a slight suppression of T_LTT but has essentially no effect on T_CO and T_SO. Magnetic field H along [110] stabilizes the spin order: the suppression of T_SO under stress along [110] is slower under H ∥ [110] than H ∥ [001]. We develop a Landau free-energy model, and we interpret our findings as an interplay of symmetry-breaking terms driven by the orientation of spins.

• Keywords (english): NMR, NQR, stripe, charge order, spin order, cuprates, LBCO, uniaxial, strain
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Journal title: Physical Review B
• Numbering: vol. 108, no. 20, 205113
• p-ISSN: 2469-9950
• e-ISSN: 2469-9969
• DOI: https://doi.org/10.1103/PhysRevB.108.205113
• URN:NBN: urn:nbn:hr:217:867795
• Publication: 2023-11
• Project: Number: 3.4-1022249-HRV-IP; Title (english): Interplay of structure, spin, and orbital order in perovskite cuprates and titanates; Acronym: INSPINOR; Leader: Miroslav Požek; Jurisdiction: Croatia; Funding stream: kompetitivno projektno financiranje
• Project: Number: IP-2018-01-2970; Title (croatian): Mikroskopska istraživanja induciranih faza u jako koreliranim elektronskim sustavima; Title (english): Microscopic study of induced phases in Strongly correlated electronic systems; Acronym: MicroS; Leader: Miroslav Požek; Jurisdiction: Croatia; Funding stream: IP
• Document URL: https://link.aps.org/doi/10.1103/PhysRevB.108.205113
• Type of resource: Text
• Access conditions: Open access
• Public note: © 2023 American Physical Society. Received 7 March 2023, Revised 22 September 2023, Accepted 16 October 2023, Published 8 November 2023.
• Created on: 2023-11-13 13:26:41