Scaling of conductance through quantum dots with magnetic field

IGNACIO J. HAMAD; CLAUDIO GAZZA; P. ROURA-BAS; P. S. CORNAGLIA; J. A. ANDRADE HOYOS; A.A. ALIGIA

Natal

Simposio; Workshop and Symposium on DMRG Technique for Strongly Correlated Systems in Physics and Chemistry; 2015

International Institute of Physics, Universidade Federal do Rio Grande do Norte.

We study the dependence of the conductance of a system in the Kondo regime under a finite magnetic field B, up to second order in units ofB/TK, where TK represents the Kondo scale of the system. The coefficient cB that characterises the correction is calculated away from the symmetric point, in all ranges of the coulomb repulsion U. To this purpose we combine Renormalized Perturbation Theory (RPT) with NRG,and, independently, calculations are done with DMRG and also with Bethe ansats, showing exelent agreement between all the approaches.This correction is relevant for characterising experiments under magnetic field, where moderate U values are suitable for describingsemiconductor quantum dots, and infinite U values are adequate for molecular Kondo systems.