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Raman study of β‐Sr 0.33 V 2 O 5 micro‐crystals under high pressure
Author(s) -
Kontos A. G.,
Lampakis D.,
Popović Z. V.,
Raptis Y. S.,
Liarokapis E.,
Isobe M.,
Ueda Y.
Publication year - 2007
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200690031
Subject(s) - raman spectroscopy , vanadium , phonon , lattice (music) , octahedron , condensed matter physics , phase transition , semiconductor , oak ridge national laboratory , materials science , engineering physics , crystallography , chemistry , physics , crystal structure , optics , metallurgy , quantum mechanics , nuclear physics , acoustics
The cover picture of the current issue relates to the article by A. G. Kontos et al. [1]. The authors study the phonon dynamics of the strontium vanadium oxide bronze β‐Sr 0.33 V 2 O 5 by Raman spectroscopy at different temperatures under high pressure up to 5.7 GPa. The material, which undergoes a metal–insulator phase transition at T MI ≈ 165 K associated with charge ordering, consists of a V 2 O 5 framework of three kinds of infinite double chains along the b ‐axis with three different sites, V 1 , V 2 and V 3 , for vanadium atoms in six‐fold octahedral and five‐fold coordination, respectively. The Sr cations are located at the sites in the tunnel formed by the V 2 O 5 framework. The corresponding author Yannis S. Raptis is Associate Pro‐ fessor at the Physics Department of the National Technical University of Athens (NTUA). His research interests include the study of optical and lattice‐dynamic properties of materials and their pressure dependence. The article is a presentation from the 12th International Conference on High Pressure Semiconductor Physics (HPSP‐12)held in Barcelona, Spain, 31 July–3 August 2006 whose proceedings are published in this issue of physica status solidi (b).