Response of Disordered Matter to Electromagnetic Fields

P. Lunkenheimer and A. Loidl
Phys. Rev. Lett. 91, 207601 – Published 10 November 2003

Abstract

We have studied a variety of different disordered materials, including molecular and ionic liquids, supercooled liquids, glasses, ionic conductors, and doped semiconductors, in ac electromagnetic fields over an exceptional broad dynamic range, including the rarely investigated GHz to THz region. All classes of disordered matter exhibit an astonishingly similar response: In addition to Jonscher’s time-honored “universal dielectric response,” a superlinear power-law increase of the frequency-dependent conductivity shows up bridging the gap between the classical dielectric and the infrared region. Thus the universal dielectric behavior of disordered matter extends up to much higher frequencies than thought until now.

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  • Received 10 April 2003

DOI:https://doi.org/10.1103/PhysRevLett.91.207601

©2003 American Physical Society

Authors & Affiliations

P. Lunkenheimer and A. Loidl

  • Experimentalphysik V, Universität Augsburg, D-86135 Augsburg, Germany

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Issue

Vol. 91, Iss. 20 — 14 November 2003

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