The response of disordered matter to electromagnetic fields

Abstract

We have studied a variety of different disordered materials, including molecular and ionic liquids, supercooled liquids and glasses, ionic conductors, and doped semiconductors, in ac electromagnetic fields over an exceptional broad dynamic range including the rarely investigated GHz to THz region. We show that 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. We demonstrate that the universal dielectric behavior of disordered matter extends up to much higher frequencies than thought until now and covers the range from ultra-low (mHz) to phonon (THz) frequencies.

4 pages, 4 figures

References in corpus (4)

• Materials with Colossal Dielectric Constant: Do They Exist?
• Glassy behavior of electrons near metal-insulator transitions
• Determination of the parameters of semiconducting CdF2:In with Schottky barriers from radio-frequency measurements
• Electrodynamics of a Coulomb Glass in n-type Silicon

Cited by in corpus (21)

• Electrodynamics of Correlated Electron Materials
• Non-intrinsic origin of the Colossal Dielectric Constants in CaCu3Ti4O12
• Colossal dielectric constants in transition-metal oxides
• On the room temperature multiferroic BiFeO3: Magnetic, dielectric and thermal properties
• Comments on frequency dependent ac conductivity in polymeric materials at low frequency regime
• Terahertz Conductivity at the Verwey Transition in Magnetite
• Broadband dielectric response of CaCu3Ti4O12: From dc to the electronic transition regime
• Dielectric properties and dynamical conductivity of LaTiO3: From dc to optical frequencies
• Optical Spectroscopy in CoO: Phonons, Electric, and Magnetic Excitations
• Apparent giant dielectric constants, dielectric relaxation, and ac-conductivity of hexagonal perovskites La1.2Sr2.7BO7.33 (B = Ru, Ir)
• Broadband dielectric spectroscopy and aging of glass formers
• Observation of Jonscher Law in AC Hopping Conduction of Electron-Doped Nanoporous Crystal 12CaO7Al2O3 in THz Frequency Range
• Origin of the Curie-von Schweidler law and the fractional capacitor from time-varying capacitance
• Phonon anomalies and charge dynamics in Fe_{1-x}Cu_{x}Cr_{2}S_{4} single crystals
• Scaling of THz-conductivity at metal-insulator transition in doped manganites
• Broadband spectroscopy of astrophysical ice analogues: II. Optical constants of CO and CO${}_2$ ices in the terahertz and infrared ranges
• Universal dielectric response across a continuous metal-insulator transition
• Large positive magneto-conductivity at microwave frequencies in the compensated topological insulator BiSbTeSe2
• Short-Time Elasticity of Polymer Melts: Tobolsky Conjecture and Heterogeneous Local Stiffness
• Dynamic conductivity of semiconducting manganites approaching the metal-insulator transition
• Electrochemical Impedance spectroscopy study of AgI-Ag2O-MoO3 Glasses: Understanding the Diffusion, Relaxation, Fragility and Power Law Behavior