Fingerprints of critical phenomena in a quantum paraelectric ensemble of nanoconfined water molecules

0558093 - FZÚ 2023 RIV US eng J - Článek v odborném periodiku
Belyanchikov, M. A. - Savinov, Maxim - Proschek, P. - Prokleška, J. - Zhukova, E.S. - Thomas, V.G. - Bedran, Z.V. - Kadlec, Filip - Kamba, Stanislav - Dressel, M. - Gorshunov, B. P.
Fingerprints of critical phenomena in a quantum paraelectric ensemble of nanoconfined water molecules.
Nano Letters. Roč. 22, č. 8 (2022), s. 3380-3384. ISSN 1530-6984. E-ISSN 1530-6992
Institucionální podpora: RVO:68378271
Klíčová slova: quantum paraelectric * water * permittivity
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 10.8, rok: 2022
Způsob publikování: Omezený přístup
https://doi.org/10.1021/acs.nanolett.2c00638

We have studied the radio frequency dielectric response of a system consisting of separate polar water molecules periodically arranged in nanocages formed by the crystal lattice of the gemstone beryl. Below T = 20–30 K, quantum effects start to dominate the properties of the electric dipolar system as manifested by a crossover between the Curie–Weiss and the Barrett regimes in the temperature-dependent real dielectric permittivity ε′(T). Between T = 6 and 14 K, the reciprocal permittivity follows a quadratic temperature dependence and displays a shallow minimum below 3 K. This is the first observation of “dielectric fingerprints” of quantum-critical phenomena in a paraelectric system of coupled point electric dipoles.
Trvalý link: http://hdl.handle.net/11104/0331893