Many Body Effects on the Transport Properties of Single-Molecule Devices

Details Many Body Effects on the Transport Properties of Single-Molecule Devices Many Body Effects on the Transport Properties of Single-Molecule Devices

2004-03-23

arxiv.org/abs/cond-mat/0403578v2

Phys. Rev. Lett. 93, 147201 (2004)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figures, minor changes, added references

Scientific paper

10.1103/PhysRevLett.93.147201

The conductance through a molecular device including electron-electron and electron-phonon interactions is calculated using the Numerical Renormalization Group method. At low temperatures and weak electron-phonon coupling the properties of the conductance can be explained in terms of the standard Kondo model with renormalized parameters. At large electron-phonon coupling a charge analog of the Kondo effect takes place that can be mapped into an anisotropic Kondo model. In this regime the molecule is strongly polarized by a gate voltage which leads to rectification in the current-voltage characteristics of the molecular junction.

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