Dresden 2014 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 74: Correlated Electrons: Quantum Impurities, Kondo Physics
TT 74.2: Vortrag
Mittwoch, 2. April 2014, 15:15–15:30, BEY 81
Transport properties of fully screened Kondo models — •Christoph B. M. Hörig1,3, Christophe Mora2, and Dirk Schuricht3 — 1Institute for Theory of Statistical Physics, RWTH Aachen University and JARA-Fundamentals of Future Information Technology, Germany — 2Laboratoire Pierre Aigrain, École Normale Supérieure, France — 3Institute for Theoretical Physics, Utrecht University, The Netherlands
We study the crossover from strong to weak coupling in two fully screened Kondo quantum dots, the spin-1/2 and the spin-1 model coupled to one or two screening channels respectively. The quantum dots are subject to either a finite bias voltage or a finite temperature. Using a real-time renormalisation group method we calculate the static susceptibility, dynamical spin-spin correlation functions, and the differential conductance. We extract the various Kondo scales and Fermi liquid coefficients at low energies and compare with exact known and newly derived Fermi liquid results.