Possible quadrupolar nematic phase in the frustrated spin chain LiCuSbO4: An NMR investigation

Bosiočić, M. and Bert, F. and Dutton, S. E. and Cava, R. J. and Baker, P. J. and Požek, Miroslav and Mendels, P. (2017) Possible quadrupolar nematic phase in the frustrated spin chain LiCuSbO4: An NMR investigation. Physical Review B, 96 (22). pp. 224424-11. ISSN 1098-0121

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The frustrated one-dimensional quantum magnet LiCuSbO4 is a rare realization of the J1−J2 spin chain model with an easily accessible saturation field, formerly estimated at 12 T. Exotic multipolar nematic phases were theoretically predicted in such compounds just below the saturation field, but without unambiguous experimental observation so far. In this paper we present extensive experimental research on the compound in a wide temperature (30 mK to 300 K) and field (0–13.3 T) range by muon spin rotation (μSR), 7Li nuclear magnetic resonance (NMR), and magnetic susceptibility (SQUID). μSR experiments in zero magnetic field demonstrate the absence of long-range 3D ordering down to 30 mK. Together with former heat capacity data [Dutton et al., Phys. Rev. Lett. 108, 187206 (2012)], magnetic susceptibility measurements suggest a short-range-correlated vector chiral phase in the field range 0–4 T. At the intermediate-field values (5–12 T), the system enters a 3D-ordered spin density wave phase with 0.75μB per copper site at lowest temperatures (125 mK), estimated by NMR. At still higher field, the magnetization is found to be saturated above 13 T where the spin lattice T−11 relaxation reveals a spin gap estimated at 3.2(2) K. We narrow down the possibility of observing a multipolar nematic phase to the range 12.5–13 T.

Item Type: Article
Date: 2017
Subjects: NATURAL SCIENCES > Physics
Additional Information: © 2017 American Physical Society. Received 15 October 2017; revised manuscript received 5 December 2017; published 20 December 2017.
Divisions: Faculty of Science > Department of Physics
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 10 Mar 2018 16:45
Last Modified: 10 Mar 2018 16:45
URI: http://digre.pmf.unizg.hr/id/eprint/5780

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