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APS » Journals » Phys. Rev. Lett. » Volume 92 » Issue 2
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Phys. Rev. Lett. 92, 026801 (2004) [4 pages]

Electron Transport in Granular Metals

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Alexander Altland1, Leonid I. Glazman2,3, and Alex Kamenev2
1Institut für theoretische Physik, Zülpicher Strasse 77, 50937 Köln, Germany
2Department of Physics, University of Minnesota, Minneapolis, Minnesota 55454, USA
3W. I. Fine Theoretical Physics Institute, University of Minnesota, Minneapolis, Minnesota 55454, USA

Received 17 July 2003; published 13 January 2004

We consider thermodynamic and transport properties of a long granular array with strongly connected grains (intergrain conductance g≫1). We find that the system’s conductance and differential capacitance exhibits activated behavior, ∼exp⁡{-T*/T}. The gap T* represents the energy needed to create a long single-electron charge soliton propagating through the array. This scale is parametrically larger than the energy at which conventional perturbation theory breaks down.

© 2004 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.92.026801
DOI:
10.1103/PhysRevLett.92.026801
PACS:
73.23.Hk, 71.30.+h, 71.45.Lr
 
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