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

Pelc, Damjan and Grafe, Hans-Joachim and Gu, Genda D. and Požek, Miroslav (2017) Cu nuclear magnetic resonance study of charge and spin stripe order in La1.875Ba0.125CuO4. Physical Review B, 95 (5). pp. 54508-8. ISSN 1098-0121

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Abstract

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.

Item Type: Article
Keywords: cuprates, charge stripes, spin stripes, nuclear quadrupolar resonance
Date: 15 January 2017
Subjects: NATURAL SCIENCES > Physics
Additional Information: © 2017 American Physical Society. Received 9 September 2016. Revised manuscript received 23 December 2016. Published 15 February 2017.
Divisions: Faculty of Science > Department of Physics
Project code: IP-2013-11-2729
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 28 Sep 2017 11:04
Last Modified: 02 Oct 2017 07:07
URI: http://digre.pmf.unizg.hr/id/eprint/5587

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