This article is dedicated to Dieter Vollhardt on the occasion of his 60th birthday.
Lattice vibrations in KCuF3†
Article first published online: 13 SEP 2011
Copyright © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Annalen der Physik
Special Issue: Special Topic Issue “Electronic Correlations in Models and Materials”
Volume 523, Issue 8-9, pages 645–651, August 2011
How to Cite
Deisenhofer, J., Schmidt, M., Wang, Z., Kant, Ch., Mayr, F., Schrettle, F., Krug von Nidda, H.-A., Ghigna, P., Tsurkan, V. and Loidl, A. (2011), Lattice vibrations in KCuF3. Ann. Phys., 523: 645–651. doi: 10.1002/andp.201100026
- Issue published online: 13 SEP 2011
- Article first published online: 13 SEP 2011
- Manuscript Accepted: 28 MAR 2011
- Manuscript Revised: 17 MAR 2011
- Manuscript Received: 11 FEB 2011
- DFG. Grant Number: TRR 80 (Augsburg-Munich)
- Infrared spectroscopy;
- orbital ordering;
- Jahn-Teller distortion.
We report on polarization dependent reflectivity measurements in KCuF3 in the far-infrared frequency regime. The observed IR active phonons at room temperature are in agreement with the expected modes for tetragonal symmetry. We observe a splitting of one mode already at 150 K and the appearance of a new mode in the vicinity of the Néel temperature.