Nonlinear Dielectric Response at the Excess Wing of Glass-Forming Liquids

被引：57

作者：

Bauer, Th. ^{[1
]}

Lunkenheimer, P. ^{[1
]}

Kastner, S. ^{[1
]}

Loidl, A. ^{[1
]}

机构：

[1] Univ Augsburg, Ctr Elect Correlat & Magnetism, D-86135 Augsburg, Germany

来源：

PHYSICAL REVIEW LETTERS | 2013年 / 110卷 / 10期

关键词：

SUPERCOOLED LIQUIDS; ELECTRIC SATURATION; LOSS MODULUS; RELAXATION; TRANSITION; SPECTROSCOPY; DYNAMICS; STATE; FIELD; TIME;

D O I：

10.1103/PhysRevLett.110.107603

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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. DOI: 10.1103/PhysRevLett.110.107603

引用

页数：5

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