Lattice softening and diffusive dynamics in the polar metal LiReO <sub>3</sub>
. Thermoelectric, Raman, and ultrasound measurements demonstrate a probe-dependent thermal hysteresis, while ultrasound data further show lattice softening and persistent resonant absorption at low temperatures across a broad timescale (1 to 100 microseconds). These observations indicate a multiscale spatiotemporal dynamics governed by a shallow anharmonic potential stabilized by itinerant electrons, as supported by finite-temperature first-principles calculations. By mapping the fluctuation landscape shaped by itinerant electrons, this work offers a previously unexplored perspective for exploiting fluctuation-driven phenomena in polar metals.
Authors
- Hideaki Sakai (ORCID: https://orcid.org/0000-0001-9839-1377)
- Ryota Masuki (ORCID: https://orcid.org/0000-0002-5407-844X)
- Morito Namba (ORCID: https://orcid.org/0000-0002-0118-9832)
- P. Lemmens (ORCID: https://orcid.org/0000-0002-0894-3412)
- Hiroshi Takatsu (ORCID: https://orcid.org/0000-0001-5792-0113)
- T. Nomoto
- H. Kageyama
- K. Ishida (ORCID: https://orcid.org/0000-0002-9824-6388)
- Simon Clevers (ORCID: https://orcid.org/0000-0002-1377-1141)
- Cédric Tassel (ORCID: https://orcid.org/0000-0002-8867-4813)
- Craig M. Brown (ORCID: https://orcid.org/0000-0002-9637-9355)
- Tatsuya Yanagisawa (ORCID: https://orcid.org/0000-0003-4558-8824)
- Valérie Dupray (ORCID: https://orcid.org/0000-0001-6188-0943)
- R. Arita
- Hiroshi Ôike (ORCID: https://orcid.org/0000-0001-6866-7774)
- Ksenia Denisova (ORCID: https://orcid.org/0000-0001-8019-2126)
- Kantaro Murayama (ORCID: https://orcid.org/0000-0003-0993-0215)
- Terumasa Tadano (ORCID: https://orcid.org/0000-0002-8132-2161)
- Keito Yoshida
- O. Mentré
- Xiangyu Gu
Institutions
- Centre National de la Recherche Scientifique (FR)
- Hokkaido University (JP)
- National Institute for Materials Science (JP)
- Kyoto University (JP)
- Japan Science and Technology Agency (JP)
- Normandie Université (FR)
- RIKEN Center for Emergent Matter Science (JP)
- Unité de catalyse et de chimie du solide de Lille (FR)
- NIST Center for Neutron Research (US)
- Université Lille Nord de France (FR)
- Université de Rouen Normandie (FR)
- Tokyo Metropolitan University (JP)
- The University of Tokyo (JP)
- University of Delaware (US)
- Technische Universität Braunschweig (DE)
- The University of Osaka (JP)
Publication Details
- Journal
- Science Advances
- Published
- 2026-04-03
- DOI
- https://doi.org/10.1126/sciadv.adt3886
- Primary Topic
- Photorefractive and Nonlinear Optics
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Nippon Sheet Glass Foundation for Materials Science and Engineering
- Deutsche Forschungsgemeinschaft
- Japan Society for the Promotion of Science
- Japan Science and Technology Agency