Saturation of Electrical Resistivity in Metals at Large Temperatures

Calandra, M.; Gunnarsson, O.

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Saturation of Electrical Resistivity in Metals at Large Temperatures

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Calandra, M.
Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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Gunnarsson, O.
Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;
Department Electronic Structure Theory (Ali Alavi), Max Planck Institute for Solid State Research, Max Planck Society;
Department Nanoscale Science (Klaus Kern), Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Calandra, M., & Gunnarsson, O. (2001). Saturation of Electrical Resistivity in Metals at Large Temperatures. Physical Review Letters, 87(26): 266601.

Cite as: https://hdl.handle.net/21.11116/0000-000E-E521-A

Abstract

We present a microscopic model for systems showing resistivity
saturation. An essentially exact quantum Monte Carlo
calculation demonstrates that the model describes saturation.
We give a simple explanation for saturation, using charge
conservation and considering the limit where thermally excited
phonons have destroyed the periodicity. Crucial model features
are phonons coupling to the hopping matrix elements and a unit
cell with several atoms. We demonstrate the difference to a
model of alkali-doped C-60 with coupling to the level
positions, for which there is no saturation.