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Evidence for an extended critical fluctuation region above the polar ordering transition in LiOsO₃

Shan, Jun-Yi and de la Torre, A. and Laurita, N. J. and Zhao, L. and Dashwood, C. D. and Puggioni, D. and Wang, C. X. and Yamaura, K. and Shi, Y. and Rondinelli, J. M. and Hsieh, D. (2020) Evidence for an extended critical fluctuation region above the polar ordering transition in LiOsO₃. Physical Review Research, 2 (3). Art. No. 033174. ISSN 2643-1564. https://resolver.caltech.edu/CaltechAUTHORS:20200731-134646814

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Abstract

Metallic LiOsO₃ undergoes a continuous ferroelectric-like structural phase transition below T_c=140K to realize a polar metal. To understand the microscopic interactions that drive this transition, we study its critical behavior above T_c via electromechanical coupling—distortions of the lattice induced by short-range dipole-dipole correlations arising from Li off-center displacements. By mapping the full angular distribution of second harmonic electric-quadrupole radiation from LiOsO₃ and performing a simplified hyper-polarizable bond model analysis, we uncover subtle symmetry-preserving lattice distortions over a broad temperature range extending from T_c up to around 230 K, characterized by nonuniform changes in the short and long Li-O bond lengths. Such an extended region of critical fluctuations may explain anomalous features reported in specific heat and Raman scattering data and suggests the presence of competing interactions that are not accounted for in existing theoretical treatments. More broadly, our results showcase how electromechanical effects serve as a probe of critical behavior near inversion symmetry-breaking transitions in metals.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1103/physrevresearch.2.033174DOIArticle
https://arxiv.org/abs/2008.00355arXivDiscussion Paper
ORCID:
AuthorORCID
Shan, Jun-Yi0000-0001-7665-2169
Puggioni, D.0000-0002-2128-4191
Wang, C. X.0000-0003-2072-2759
Yamaura, K.0000-0003-0390-8244
Rondinelli, J. M.0000-0003-0508-2175
Hsieh, D.0000-0002-0812-955X
Additional Information:© 2020 Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Received 23 January 2020; revised 30 April 2020; accepted 9 July 2020; published 31 July 2020. We thank A. Boothroyd and D. Khalyavin for sharing their neutron diffraction data. We also acknowledge useful discussions with S. Biswas, J. S. Lee, P. A. Lee, C. Li, C. Ma, A. Ron, and J. Schmehr. This work was supported by the U.S. Department of Energy under Grant No. DE SC0010533. D.H. also acknowledges funding from the David and Lucile Packard Foundation and support for instrumentation from the Institute for Quantum Information and Matter, an NSF Physics Frontiers Center (PHY-1733907). N.J.L. acknowledges partial support from the IQIM postdoctoral fellowship. D.P. and J.M.R. were supported by ARO (Award No. W911NF-15-1-0017). Y.G.S. was supported by the National Key Research and Development Program of China (Grants No. 2017YFA0302901 and No. 2016YFA0300604), as well as by the K. C. Wong Education Foundation (GJTD-2018-01).
Group:Institute for Quantum Information and Matter
Funders:
Funding AgencyGrant Number
Department of Energy (DOE)DE-SC0010533
David and Lucile Packard FoundationUNSPECIFIED
NSFPHY-1733907
Institute for Quantum Information and Matter (IQIM)UNSPECIFIED
Army Research Office (ARO)W911NF-15-1-0017
National Key Research and Development Program of China2017YFA0302901
National Key Research and Development Program of China2016YFA0300604
K. C. Wong Education FoundationGJTD-2018-01
Issue or Number:3
Record Number:CaltechAUTHORS:20200731-134646814
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20200731-134646814
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:104683
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:31 Jul 2020 21:04
Last Modified:24 Aug 2020 16:47

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