Nonlinear dielectric response at the excess wing of glass-forming liquids

Abstract

We present nonlinear dielectric measurements of glass-forming glycerol and propylene carbonate applying electrical fields up to 671 kV/cm. The measurements extend to sufficiently high frequencies to allow for the investigation of the nonlinear behavior in the regime of the so-far mysterious excess wing, showing up in the loss spectra of many glass formers as a second power law at high frequencies. Surprisingly, we find a complete lack of nonlinear behavior in the excess wing, in marked contrast to the alpha-relaxation where, in agreement with previous reports, a strong increase of dielectric constant and loss is found.

arXiv comment8 pages (including 3 pages Supplementary Information), 4 + 1 figures. Revised according to suggestions of referees

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• Investigation of nonlinear effects in glassy matter using dielectric methods
• Nonlinear dielectric response of Debye, alpha, and beta relaxation in 1-propanol
• Unifying different interpretations of the nonlinear response in glass-forming liquids
• Low temperature dielectric relaxation study of aqueous solutions of diethylsulfoxide
• Third and Fifth Harmonic Responses in Viscous Liquids
• Johari-Goldstein relaxation in glass-electrets
• Amorphous Order & Non-linear Susceptibilities in Glassy Materials