Materials with Colossal Dielectric Constant: Do They Exist?

Abstract

Experimental evidence is provided that colossal dielectric constants, epsilon >= 1000, sometimes reported to exist in a broad temperature range, can often be explained by Maxwell-Wagner type contributions of depletion layers at the interface between sample and contacts, or at grain boundaries. We demonstrate this on a variety of different materials. We speculate that the largest intrinsic dielectric constant observed so far in non-ferroelectric materials is of order 100.

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References in corpus (4)

• A first-principles study of the structure and lattice dielectric response of CaCu{3}Ti{4}O{12}
• Dielectric catastrophe at the Mott transition
• Linear and nonlinear optical characteristics of the Falicov-Kimball model
• Determination of the parameters of semiconducting CdF2:In with Schottky barriers from radio-frequency measurements

Cited by in corpus (115)

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