Exchange interaction in chirally coupled quantum dots

20th International Conference on the Application of High Magnetic Fields in Semiconductor Physics

Tutuc, Daniel^1 ; Heine, Alexander W.^1 ; Schuh, Dieter^2 ; Wegscheider, Werner^2,3 ; Haug, Rolf J.^1

Institut für Festkörperphysik, Leibniz Universität Hannover, Appelstraße 2, D-30167 Hannover, Germany^1

Institut für Experimentelle und Angewandte Physik, Universtät Regensburg, Universitätsstraße 31, D-93053 Regensburg, Germany^2

Laboratorium für Festkörperphysik, ETH Zürich, Schafmattstraße 16, CH-8093 Zürich, Switzerland^3

关键词: Coupled quantum dots;    Differential conductances;    Edge channels;    Kondo resonances;    Perpendicular magnetic fields;    RKKY interactions;    Temperature dependence;    Transport measurements;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/456/1/012014/pdf
DOI  :  10.1088/1742-6596/456/1/012014

来源: IOP

【 摘 要 】

We present transport measurements on a system of two lateral quantum dots in a perpendicular magnetic field. Due to edge channel formation in an open conducting region, the quantum dots are chirally coupled. When both quantum dots are tuned into the Kondo regime simultaneously, we observe a change in the temperature dependence of the differential conductance. This is explained by the RKKY exchange interaction between the two dots. As a function of bias the differential conductance shows a splitting of the Kondo resonance which changes in the presence of RKKY interaction.