Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/14399
Title: An atomistic approach to the dielectric modes of BaTiO 3 and SrTiO 3
Authors: Deng, HY
Lam, CH 
Huang, H 
Keywords: Ferroelectrics
Anharmonicity
Dielectric response
Issue Date: 2011
Publisher: Pergamon Press
Source: Solid state communications, 2011, v. 151, no. 6, p. 474-477 How to cite?
Journal: Solid state communications 
Abstract: Recently, a clear long-sought Debye mode (D) in barium titanate (BT) was identified [J. Hlinka, T. Ostapchuk, D. Nuzhnyy, J. Petzelt, P. Kuzel, C. Kadlec, P. Vanek, I. Ponomareva, L. Bellaiche, Phys. Rev. Lett. 101 (2008) 167402] and this mode was shown to originate from the polar coordinate that also generates the so-called Slater mode (S). The inter-relations between the D mode and the normal A1-type phonon modes were studied by those authors using a four-mode phenomenological model. The present work is to offer an atomistic support of their work and to better illustrate the nature of and the couplings between these modes. In addition, we extend the as-obtained insights to the investigation of the nature of the low frequency Raman peaks that were found in 18O-substituted strontium titanate (ST) many years ago [M. Itoh, R. Wang, Y. Inaguma, T. Yamaguchi, Y.-J. Shan, T. Nakamura, Phys. Rev. Lett. 82 (1999) 3540]. Thus, our work provides important information on the connections between the lattice dynamics of BT and ST.
URI: http://hdl.handle.net/10397/14399
ISSN: 0038-1098
EISSN: 1879-2766
DOI: 10.1016/j.ssc.2010.12.033
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