We consider a double quantum dot in the Kondo regime, coupled to ferromagnetic electrodes in a parallel magnetization configuration, and investigate the influence of the leads’ spin polarization on the Kondo temperature. We perform a second order analytical scaling analysis and compare the results to numerical renormalization group (NRG) simulations. Under certain conditions, a crossover from the orbital and spin SU(4) to an orbital SU(2) Kondo effect is observed as the polarization is varied.
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