Slave boson theory for transport through magnetic molecules with vibronic states

Regueiro, M. D. Nuñez; Cornaglia, P. S.; Usaj, Gonzalo; Balseiro, C. A.

Slave boson theory for transport through magnetic molecules with vibronic states

Authors

Regueiro, M. D. Nuñez

Cornaglia, P. S.

Usaj, Gonzalo

Balseiro, C. A.

Description

We study the electron transport through a magnetic molecular transistor in the Kondo limit using the slave boson technique. We include the electron-phonon coupling and analyze the cases where the spin of the molecule is either S=1/2 or S=1. We use the Schrieffer-Wolff transformation to write down a low energy Hamiltonian for the system. In the presence of electron-phonon coupling, and for $S\smeq1$, the resulting Kondo Hamiltonian has two active channels. At low temperature, these two channels interfere destructively, leading to a zero conductance.
7 pages, 4 figures, to be published in PRB