Foundations of Physics

, Volume 30, Issue 12, pp 2135–2150 | Cite as

Giant Nonlinear Absorption by an Ensemble of Metallic Grains

  • Y. M. Galperin
  • K. A. Chao


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.


Magnetic Field Microwave Excited State External Magnetic Field Field Amplitude 
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Copyright information

© Plenum Publishing Corporation 2000

Authors and Affiliations

  • Y. M. Galperin
    • 1
    • 2
    • 3
  • K. A. Chao
    • 4
  1. 1.Centre for Advanced StudyOsloNorway
  2. 2.Department of PhysicsUniversity of OsloOsloNorway
  3. 3.Division of Solid State PhysicsIoffe Institute of the Russian Academy of SciencesSt. PetersburgRussia
  4. 4.Division of Solid State Theory, Department of PhysicsLund UniversityLundSweden

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