New Ground State of Dipolar Lattice of D2O@Beryl
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2021-12-27 07:42
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BELYANCHIKOV, M., SAVINOV, M., THOMAS, V., DRESSEL, Martin, GORSHUNOV, Boris. New Ground State of Dipolar Lattice of D2O@Beryl. In: Nanotechnologies and Biomedical Engineering, Ed. 5, 3-5 noiembrie 2021, Chişinău. Chişinău: Pontos, 2021, Ediția 5, p. 82. ISBN 978-9975-72-592-7.
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Nanotechnologies and Biomedical Engineering
Ediția 5, 2021
Conferința "Nanotechnologies and Biomedical Engineering"
5, Chişinău, Moldova, 3-5 noiembrie 2021

New Ground State of Dipolar Lattice of D2O@Beryl


Pag. 82-82

Belyanchikov M.1, Savinov M.2, Thomas V.34, Dressel Martin5, Gorshunov Boris1
 
1 Moscow Institute of Physics and Technology,
2 Institute of Physics of Academy of Sciences of the Czech Republic, Prague,
3 Novosibirsk State University,
4 V.S. Sobolev Institute of Geology and Mineralogy of the Siberian Branch of the RAS,
5 Physikalisches Institut, Universität Stuttgart, Stuttgart
 
Disponibil în IBN: 17 noiembrie 2021


Rezumat

High quality beryl crystals with D2O molecules in nanocages are synthesized and carefully characterized. IR mapping of the crystals showed drastically different concentration distribution of water-I and water-II molecules. The effect of water concentration on the dielectric properties of D2O@Beryl was systematically studied. Two areas of the crystal with same water-I concentration and highly different water-II concentrations were studied by temperature-dependent terahertz and impedance spectroscopy. The experiments reveal a strong dependence of the dielectric properties of the crystal on water-II concentration. The sample with low water-II content showed an anomaly at T=2 K in the temperature behavior of radiofrequency permittivity; no saturation in the temperature-dependent behavior of terahertz soft mode is observed. These observations contrast with our previous results on incipient ferroelectricity in H2O@Beryl. We speculate about a possibility of new ground state developed in dipolar water lattice in beryl.