%0 Journal Article %1 doi:10.1021/acs.nanolett.2c00638 %A Belyanchikov, Mikhail A. %A Savinov, Maxim %A Proschek, Petr %A Prokleška, Jan %A Zhukova, Elena S. %A Thomas, Victor G. %A Bedran, Zakhar V. %A Kadlec, Filip %A Kamba, Stanislav %A Dressel, Martin %A Gorshunov, Boris P. %D 2022 %J Nano Letters %K nanoconfined-water-molecules radio-frequency-dielectric-response %N 8 %P 3380-3384 %R 10.1021/acs.nanolett.2c00638 %T Fingerprints of Critical Phenomena in a Quantum Paraelectric Ensemble of Nanoconfined Water Molecules %U /brokenurl# https://doi.org/10.1021/acs.nanolett.2c00638 %V 22 %X 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). When analyzing in detail the temperature evolution of the reciprocal permittivity (ε′)−1 down to T ≈ 0.3 K and comparing it with the data obtained for conventional quantum paraelectrics, like SrTiO3, KTaO3, we discovered clear signatures of a quantum-critical behavior of the interacting water molecular dipoles: 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.

@article{doi:10.1021/acs.nanolett.2c00638, abstract = { 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). When analyzing in detail the temperature evolution of the reciprocal permittivity (ε′)−1 down to T ≈ 0.3 K and comparing it with the data obtained for conventional quantum paraelectrics, like SrTiO3, KTaO3, we discovered clear signatures of a quantum-critical behavior of the interacting water molecular dipoles: 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. }, added-at = {2022-06-20T08:50:07.000+0200}, author = {Belyanchikov, Mikhail A. and Savinov, Maxim and Proschek, Petr and Prokleška, Jan and Zhukova, Elena S. and Thomas, Victor G. and Bedran, Zakhar V. and Kadlec, Filip and Kamba, Stanislav and Dressel, Martin and Gorshunov, Boris P.}, biburl = {https://puma.ub.uni-stuttgart.de/bibtex/28368cf4d685e2c72d2a424da6a49f4f1/dr.helgakumric}, doi = {10.1021/acs.nanolett.2c00638}, eprint = {https://doi.org/10.1021/acs.nanolett.2c00638}, interhash = {021e31148201f6c2404b1599241d0696}, intrahash = {8368cf4d685e2c72d2a424da6a49f4f1}, journal = {Nano Letters}, keywords = {nanoconfined-water-molecules radio-frequency-dielectric-response}, note = {PMID: 35389652}, number = 8, pages = {3380-3384}, timestamp = {2022-06-20T06:50:07.000+0200}, title = {Fingerprints of Critical Phenomena in a Quantum Paraelectric Ensemble of Nanoconfined Water Molecules}, url = {/brokenurl# https://doi.org/10.1021/acs.nanolett.2c00638 }, volume = 22, year = 2022 }