2021/04/05 by Yui Ishii, Y. Ishii, Ishii, Y. +19
Engineering · Materials Science · Physics and Astronomy · #Acoustic Wave Resonator Technologies #FOS: Physical sciences #Ferroelectric and Piezoelectric Materials #Materials Science (cond-mat.mtrl-sci) #Other Condensed Matter (cond-mat.other) #Solid-state spectroscopy and crystallography #cond-mat.mtrl-sci #cond-mat.other
paper · pdf · doi:10.48550/arxiv.2104.01969
6 pages, 4 figures
arxiv created 2021/04/05 · openalex publication_date 2021/04/05 · arxiv updated 2021/04/06 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Quest for new states of matter near an ordered phase is a promising route for making modern physics forward. By probing thermal properties of a ferroelectric (FE) crystal Ba1-xSrxAl2O4, we have clarified that low-energy excitation of acoustic phonons is remarkably enhanced with critical behavior at the border of the FE phase. The phonon spectrum is significantly damped toward the FE phase boundary and transforms into glasslike phonon excitation which is reminiscent of a boson peak. This system thus links long-standing issues of amorphous solids and structural instability in crystals to pave the way to controlling lattice fluctuation as a new tuning parameter.