Fingerprints of Critical Phenomena in a Quantum Paraelectric Ensemble of Nanoconfined Water Molecules. / Belyanchikov, Mikhail A.; Savinov, Maxim; Proschek, Petr et al.
In: Nano Letters, Vol. 22, No. 8, 27.04.2022, p. 3380-3384.Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - Fingerprints of Critical Phenomena in a Quantum Paraelectric Ensemble of Nanoconfined Water Molecules
AU - Belyanchikov, Mikhail A.
AU - Savinov, Maxim
AU - Proschek, Petr
AU - Prokleška, Jan
AU - Zhukova, Elena S.
AU - Thomas, Victor G.
AU - Bedran, Zakhar V.
AU - Kadlec, Filip
AU - Kamba, Stanislav
AU - Dressel, Martin
AU - Gorshunov, Boris P.
N1 - Funding Information: The work was supported by the Russian Science Foundation, Grant 22-22-00091. We are grateful to A. Loidl and P. Lunkenheimer for fruitful discussions. Publisher Copyright: © 2022 American Chemical Society.
PY - 2022/4/27
Y1 - 2022/4/27
N2 - 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.
AB - 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.
KW - nanoconfined water
KW - quantum criticality
KW - quantum paraelectric
KW - spectroscopy
UR - http://www.scopus.com/inward/record.url?scp=85128583142&partnerID=8YFLogxK
U2 - 10.1021/acs.nanolett.2c00638
DO - 10.1021/acs.nanolett.2c00638
M3 - Article
C2 - 35389652
AN - SCOPUS:85128583142
VL - 22
SP - 3380
EP - 3384
JO - Nano Letters
JF - Nano Letters
SN - 1530-6984
IS - 8
ER -
ID: 35992265