Lattice softening and diffusive dynamics in the polar metal LiReO3
Joint press release (in Japanese) Kyoto university, The University of Tokyo and Hokkaido University
Abstract
Polar metals, characterized by the nontrivial coexistence of metallicity and polar structural order, define an emerging frontier in quantum materials research. However, the interplay between their structural phase transitions and fluctuation dynamics remains poorly understood. Here, we reveal distinct diffusive dynamics in metallic lithium rhenium trioxide (LiReO3) associated with its polar-to-nonpolar transition. Unlike isostructural lithium niobate (LiOsO3) and related systems, LiReO3 exhibits pronounced phase fluctuations both above and below Ts. 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…
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Article Information:
Kantaro Murayama, Ryota Masuki, Cédric Tassel, Hideaki Sakai, Tatsuya Yanagisawa , Keito Yoshida, Hiroshi Oike, Suguru Yoshida, Xiangyu Gu, Kohdai Ishida, Morito Namba, Ksenia Denisova, Valérie Dupray, Simon Clevers, Olivier Mentré, Takuya Nomoto, Terumasa Tadano, Craig M. Brown , Peter Lemmens, Ryotaro Arita, Hiroshi Takatsu and Hiroshi Kageyama, Lattice softening and diffusive dynamics in the polar metal LiReO3, Science Advances, 12, 14, 2006
DOI:10.1126/sciadv.adt3886
