| Issue |
Europhys. Lett.
Volume 69, Number 3, February 2005
|
|
|---|---|---|
| Page(s) | 435 - 441 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2004-10355-6 | |
| Published online | 24 December 2004 | |
Thermal transport in granular metals
1
Materials Science Division, Argonne National Laboratory - Argonne, IL 60439, USA
2
Laboratoire de Physique et Modélisation des Milieux Condensés CNRS and Université Joseph Fourier - BP 166, 38042 Grenoble-cedex 9, France
3
NEST-INFM and Scuola Normale Superiore - I-56126 Pisa, Italy
Received:
27
August
2004
Accepted:
19
November
2004
We study the electron thermal transport in granular metals at
large tunnel conductance between the grains, 
,
and not too low a temperature, 
, where
δ is the mean energy level spacing for a single grain.
Taking into account the electron-electron interaction effects, we
calculate the thermal conductivity and show that the
Wiedemann-Franz law is violated for granular metals. We find that
interaction effects suppress the thermal conductivity less than
the electrical conductivity.
PACS: 73.23.Hk – Coulomb blockade; single-electron tunneling / 73.22.Lp – Collective excitations / 72.15.Jf – Thermoelectric and thermomagnetic effects
© EDP Sciences, 2005
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