Structural phase transition in two-dimensional tetramer-cuprate Na5RbCu4(AsO4)4Cl2
- Gnezdilov, V.
- Bedarev, V.
- Gnatchenko, S.
- Pashchenko, M.
- Pashkevich, Yu.
- Lemmens, P.
- Zvyagin, S.
- Mo, X.
- Queen, W.
- Hwu, S.-J.
Publication date
February 2017
DOI Publisher
AIP Publishing ISSN
1063-777X Citation count (estimate)
3Abstract
Raman scattering and optical birefringence were used in to investigate a low-temp. phase transition in a single crystal of the 2D Na5RbCu4(AsO4)4Cl2. Phonon anomalies point to a 1st-order nature of the transition. The obsd. transition is most probably related to an order-disorder transition of the Rb ion positions along the z axis within the ionic framework of mixed alkali metal chloride lattices. (c) 2007 American Institute of Physics
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