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• W1993030904 abstract "We present a comprehensive theoretical study of $1/f$ noise in chalcogenide glasses aimed at applications to the developing technology of phase change memory. Our consideration is based on a body of formerly established facts about the atomic and electronic excitations specific to the chalcogenide glasses, which have not been considered in recent work; we give a brief survey of the relevant information. Our analysis reveals three possible mechanisms of $1/f$ noise in chalcogenide glasses: mobility fluctuations due to transitions in the double-well potentials of the glass, concentration fluctuations due to the same, and generation-recombination noise due to multiphonon electronic transitions in the quasicontinuous spectrum of electronic states in the mobility gap. We show that double-well potentials are the most likely source of the observed $1/f$ noise. Furthermore, we discriminate between the double-well potentials of atomic and electronic nature. The latter are related to the spatially close (intimate) pairs of oppositely charged negative-$U$ centers and provide a much stronger effect on the $1/f$ noise. Our theory gives explicit expressions for the noise amplitude and the Hooge parameters corresponding to all mechanisms of $1/f$ noise in chalcogenide glasses. Most of these expressions are obtained in both a simplistic intuitive way and by means of much more involved rigorous analysis provided in the paper's Appendixes." @default.
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• W1993030904 date "2009-04-21" @default.
• W1993030904 modified "2023-09-26" @default.
• W1993030904 title "Possible mechanisms for<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:mn>1</mml:mn><mml:mo>/</mml:mo><mml:mi>f</mml:mi></mml:mrow></mml:math>noise in chalcogenide glasses: A theoretical description" @default.
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• W1993030904 doi "https://doi.org/10.1103/physrevb.79.165206" @default.
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