Cu nuclear magnetic resonance study of charge and spin stripe order in La1.875Ba0.125CuO4

Scientific paper - Original scientific paper

• Author: Damjan Pelc; MBZ: 334826
• Author: Hans-Joachim Grafe
• Author: Genda D. Gu
• Author: Miroslav Požek; MBZ: 160426
• Author's institution: University of Zagreb; Faculty of Science; (Department of Physics)
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics

Abstract (english)

We present a Cu nuclear magnetic/quadrupole resonance study of the charge stripe ordered phase of LBCO, with detection of previously unobserved (“wiped-out”) signal. We show that spin-spin and spin-lattice relaxation rates are strongly enhanced in the charge ordered phase, explaining the apparent signal decrease in earlier investigations. The enhancement is caused by magnetic, rather than charge fluctuations, conclusively confirming the long-suspected assumption that spin fluctuations are responsible for the wipeout effect. Observation of the full Cu signal enables insight into the spin and charge dynamics of the stripe-ordered phase, and measurements in external magnetic fields provide information on the nature and suppression of spin fluctuations associated with charge order. We find glassy spin dynamics, in agreement with previous work, and incommensurate static charge order with charge modulation amplitude similar to other cuprate compounds, suggesting that the amplitude of charge stripes is universal in the cuprates.

• Keywords (english): cuprates; charge stripes; spin stripes; nuclear quadrupolar resonance
• 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. 95, no. 5, 054508
• p-ISSN: 2469-9950
• DOI: https://doi.org/10.1103/PhysRevB.95.054508
• URN:NBN: urn:nbn:hr:217:584178
• Publication: 2017
• Project: Number: IP-2013-11-2729; Title (croatian): Lokalna proba i mezoskopska dinamika u novim fazama jako koreliranih elektronskih sustava; Acronym: LOMEDY; Leader: Miroslav Požek; Jurisdiction: Croatia; Funding stream: IP
• Document URL: https://journals.aps.org/prb/abstract/10.1103/PhysRevB.95.054508
• Type of resource: Text
• Access conditions: Open access
• Public note: © 2017 American Physical Society. Received 9 September 2016. Revised manuscript received 23 December 2016. Published 15 February 2017.
• Created on: 2020-02-28 18:37:13