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19 April 2024

» arxiv » cond-mat/0012383

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Structural Phase Transition in the 2D Spin Dimer Compound SrCu2(BO3)2
K. Sparta ; G.J. Redhammer ; P. Roussel ; G. Heger ; G. Roth ; P. Lemmens ; A. Ionescu ; M. Grove ; G. Guentherodt ; F. Huening ; H. Lueken ; H. Kageyama ; K. Onizuka ; Y. Ueda ;
Date:	20 Dec 2000
Subject:	Strongly Correlated Electrons \| cond-mat.str-el
Abstract:	A displacive, 2nd order structural phase transition at Ts=395 K from space group I`4 2 m below Ts to I 4/m c m above Ts has been discovered in the two-dimensional spin dimer compound SrCu2(BO3)2. The temperature evolution of the structure in both phases has been studied by X-ray diffraction and Raman scattering, supplemented by differential scanning calorimetry and SQUID magnetometry. The implications of this transition and of the observed phonon anomalies in Raman scattering for spin-phonon and interlayer coupling in this quantum spin system will be discussed.
Source:	arXiv, cond-mat/0012383
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