Broad-band spectroscopy of nanoconfined water molecules

M. A. Belyanchikov, M. Savinov, Z. V. Bedran, P. Bednyakov, P. Proschek, J. Prokleska, V. I. Torgashev, E. S. Zhukova, S. S. Zhukov, L. S. Kadyrov, V. Thomas, A. Dudka, A. Zhugayevych, V. B. Anzin, R. K. Kremer, J. K.H. Fischer, P. Lunkenheimer, A. Loidl, E. Uykur, M. DresselB. Gorshunov

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

1 Citation (Scopus)

Abstract

We have performed broad-band spectroscopic investigations of vibrational and relaxational excitations of water molecules confined to nanocages within artificial beryl and mineral cordierite crystals. Signatures of quantum critical phenomena within the H2O molecular network are registered in beryl. In cordierite, a density functional analysis is applied to reconstruct the potential energy landscape experienced by H2O molecules, revealing a pronounced anisotropy with a potential well of about 10 meV for the molecular dipole moment aligned along the b-axis. This anisotropy leads to a strongly temperature dependent and anisotropic relaxational response of the dipoles at radiofrequencies with the activation energies corresponding to the barriers of the rotational potential. At T ≈ 3 K, we identify signatures of a transition into a glassy state composed by clusters of H2O dipoles. Rich set of anisotropic and temperature-dependent excitations are observed in the terahertz frequency range which we associate with rotational/translational vibrations.

Original languageEnglish
Title of host publication4th International Conference on Nanotechnologies and Biomedical Engineering - Proceedings of ICNBME 2019
EditorsIon Tiginyanu, Victor Sontea, Serghei Railean
PublisherSpringer Gabler
Pages7-11
Number of pages5
ISBN (Print)9783030318659
DOIs
Publication statusPublished - 1 Jan 2020
Event4th International Conference on Nanotechnologies and Biomedical Engineering, ICNBME 2019 - Chisinau, Moldova, Republic of
Duration: 18 Sep 201921 Sep 2019

Publication series

NameIFMBE Proceedings
Volume77
ISSN (Print)1680-0737
ISSN (Electronic)1433-9277

Conference

Conference4th International Conference on Nanotechnologies and Biomedical Engineering, ICNBME 2019
CountryMoldova, Republic of
CityChisinau
Period18.09.201921.09.2019

Keywords

  • Ferroelectricity
  • Nanoconfined water
  • Quantum criticality
  • Spectroscopy

Fingerprint

Dive into the research topics of 'Broad-band spectroscopy of nanoconfined water molecules'. Together they form a unique fingerprint.

Cite this