Debye-like diffusive central mode near the phase transition in ferroelectric lithium tantalate |
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| Authors: | AF Penna A Chaves SPS Porto |
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| Institution: | University of Southern California, Physics Department, USA;Instituto de Física “Gleb Wataghin”, Universidade Estadual de Campinas, CP 1170, Campinas S.P., Brasil |
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| Abstract: | We report a clear cut evidence of a temperature dependent diffusive central mode associated with the ferroelectric phase transition of LiTaO3; a detailed linshape analysis shows that this central mode is a Debye-like relaxation. We also show its influence in the dielectric constant through polariton measurements for several temperatures. |
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