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Giant Nonlinear Absorption by an Ensemble of Metallic Grains

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Abstract

We have investigated the nonlinear low-frequency microwave absorption of an ensemble of small metallic grains. Earlier Zhou et al. [Phys. Rev. Lett. 77, 1958 (1996)] have proved that linear absorption by such a system is due to a mesoscopic relaxation mechanism for which important contribution is from the grains with small level spacings between the ground state and the first excited state. Here we have shown further that such grains are anomalously sensitive to the field amplitude and the distribution of level spacings. Since such a behavior depends on external magnetic field, we expect the appearance of a giant nonlinear magnetoresistance, as well as a very strong temperature dependence of the nonlinear microwave conductivity.

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Authors and Affiliations

  1. Centre for Advanced Study, Drammensveien 78, N-0271, Oslo, Norway

    Y. M. Galperin

  2. Department of Physics, University of Oslo, P.O. Box 1048, N-0316, Oslo, Norway

    Y. M. Galperin

  3. Division of Solid State Physics, Ioffe Institute of the Russian Academy of Sciences, St. Petersburg, 194021, Russia

    Y. M. Galperin

  4. Division of Solid State Theory, Department of Physics, Lund University, Sölvegatan 14A, S-22362, Lund, Sweden

    K. A. Chao

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  1. Y. M. Galperin
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  2. K. A. Chao
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Galperin, Y.M., Chao, K.A. Giant Nonlinear Absorption by an Ensemble of Metallic Grains. Foundations of Physics 30, 2135–2150 (2000). https://doi.org/10.1023/A:1003749709837

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