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LINEWIDTH OF PHONONS IN ORDER–DISORDER PHASE TRANSITIONS WITH RANDOM TELEGRAPH NOISE

H. KARACALI

Department of Physics, Abant Izzet Baysal University, 14280 Gölköy Bolu, Turkey

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and

H. YURTSEVEN

Department of Physics, Middle East Technical University, 06531 Ankara, Turkey

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https://doi.org/10.1142/S0217979211058547Cited by:0 (Source: Crossref)

Abstract

We derive an expression for the linewidth of phonons involved in the order–disorder phase transitions in solids. The linewidth is obtained as a function of the dwell time from which the activation energy can be computed. A new viewpoint is presented on the assumption that the fluctuations in the random variable of the noise, which is carried by the random particles involved in the order–disorder mechanism, affect the linewidth of the phonons.

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