Unusual set of anomalies in the lattice dynamics of lawsonite near its phase transitions
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F22%3A00569211" target="_blank" >RIV/68378271:_____/22:00569211 - isvavai.cz</a>
Result on the web
<a href="https://ieeexplore.ieee.org/document/9895469" target="_blank" >https://ieeexplore.ieee.org/document/9895469</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1109/IRMMW-THz50927.2022.9895469" target="_blank" >10.1109/IRMMW-THz50927.2022.9895469</a>
Alternative languages
Result language
angličtina
Original language name
Unusual set of anomalies in the lattice dynamics of lawsonite near its phase transitions
Original language description
Lawsonite is a water-containing mineral occurring in the Earth’s crust and mantle, exhibiting low-temperature ferroelectricity linked to water molecules. Using broad-band polarized electromagnetic spectroscopy, we studied the lattice dynamics of a single crystal between 1Hz and 20THz at temperatures from 20 to 500K. We identified three anomalies associated with the two phase transitions occurring at 270 and 124K—a critical GHz relaxation, a soft THz phonon, and an overdamped sub-THz excitation in the E∥a,E∥b and E∥c permittivity spectra, respectively. The fact that the soft mode is polarized perpendicularly to the ferroelectric axis is very unusual.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
—
OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
<a href="/en/project/GA20-01527S" target="_blank" >GA20-01527S: Interactions among water molecules localized in crystals tending to their orientational ordering</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) /47./
ISBN
978-1-7281-9427-1
ISSN
2162-2027
e-ISSN
—
Number of pages
2
Pages from-to
9895469
Publisher name
IEEE
Place of publication
New York
Event location
Delft
Event date
Aug 28, 2022
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
000865953000004