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THz–IR spectroscopy of single H.sub.2./sub.O molecules confined in nanocage of beryl crystal lattice
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SYSNO ASEP 0439787 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title THz–IR spectroscopy of single H2O molecules confined in nanocage of beryl crystal lattice Author(s) Gorshunov, B. P. (RU)
Zhukova, E.S. (RU)
Torgashev, V. I. (RU)
Motovilova, E.A. (RU)
Lebedev, V.V. (RU)
Prokhorov, A. S. (RU)
Shakurov, G.S. (RU)
Kremer, R. K. (DE)
Uskov, V.V. (RU)
Pestrjakov, E.V. (RU)
Thomas, V.G. (RU)
Fursenko, D.A. (RU)
Kadlec, Christelle (FZU-D) RID, ORCID
Kadlec, Filip (FZU-D) RID, ORCID, SAI
Dressel, M. (DE)Source Title Phase Transitions. - : Taylor & Francis - ISSN 0141-1594
Roč. 87, 10-11 (2014), s. 966-972Number of pages 7 s. Language eng - English Country GB - United Kingdom Keywords terahertz spectroscopy ; nano-confined water molecule Subject RIV BM - Solid Matter Physics ; Magnetism R&D Projects GA14-25639S GA ČR - Czech Science Foundation (CSF) Institutional support FZU-D - RVO:68378271 UT WOS 000345840100007 EID SCOPUS 84907894079 DOI 10.1080/01411594.2014.954247 Annotation We have measured the terahertz-infrared (3-7000cm(-1)) spectra of the optical conductivity of iron-doped single crystals of beryl, (Mn,Fe):Be3Al2Si6O18, that contain lone water molecules isolated within nanometer-sized cages formed by the ions of beryl crystal lattice. By comparing the spectra with those of dehydrated crystals, we exclude phonon resonances and reconstruct the spectra determined exclusively by vibrations of the water molecules. At liquid-helium temperatures, well-known intramolecular H2O modes are observed above 1000cm(-1) and accompanied with satellite resonances that are combinations of intramolecular and external vibrations of H2O molecules. At terahertz frequencies, a broad bump centred around 20cm(-1) (at 5K) is observed with three rather narrow resonances at its high-frequency shoulder (38, 42 and 46cm(-1)). The origin of these low-energy excitations is discussed. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2015
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