title: Fractal dynamics in a single crystal of a relaxor ferroelectric.
abstract: We report the high-resolution and broadband light-scattering spectroscopy of a single crystal of a prototypical relaxor ferroelectric, Pb(Mg(1/3)Nb(2/3))O(3). A self-similar broad central peak, whose intensity is expressed as I(ω) [Symbol: see text] ω(α) has been observed, indicating the presence of a fractal in the crystal. A strong correspondence exists between the temperature dependence of the exponent α and that of the reported behaviors of polar nanoregions. The estimated fractal dimension (d(f) ≈ 2.6) at low temperatures clearly indicates a percolation transition of the polar nanoregions at around 240 K.
authors.affiliation: Department of Physics, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan.
authors.forename: Akitoshi
authors.initials: A
authors.lastname: Koreeda
authors.forename: Hiroki
authors.initials: H
authors.lastname: Taniguchi
authors.forename: Seishiro
authors.initials: S
authors.lastname: Saikan
authors.forename: Mitsuru
authors.initials: M
authors.lastname: Itoh