Slave boson theory for transport through magnetic molecules with vibronic states

M. D. NUÑEZ REGUEIRO; P. S. CORNAGLIA; GONZALO USAJ; C. A. BALSEIRO,

PHYSICAL REVIEW B - CONDENSED MATTER AND MATERIALS PHYSICS

Año: 2007 vol. 76 p. 75425 - 75425

0163-1829

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=1, the resulting Kondo Hamiltonian has two active channels. At low temperature, these two channels interfere destructively, leading to a zero conductance.