[Tu-A1-G] Electron Correlations in Low-Dimensional Systems

9:30 AM - 9:45 AM JST(12:30 AM - 12:45 AM UTC)

[Tu-A1-G-02] Interplay between the Kondo screening and Ruderman–Kittel–Kasuya–Yosida (RKKY) interaction in a double quantum dot system

〇Ngoc Han Tu¹, Hiyu Kozaki², Keisuke Ito², Minseok Jang³, Donghoon Kim⁴, David Pomaranski^1,2, Arne Ludwig⁵, Andreas D. Wieck⁵, Heung-Sun Sim³, Michihisa Yamamoto^1,2,6 (1. Quantum Electron Devices Research Team, CEMS, Riken (Japan), 2. Department of Applied Physics, The University of Tokyo (Japan), 3. Department of Physics, Korea Advanced Institute of Science and Technology (Korea), 4. Center for Quantum Computing, RIKEN (Japan), 5. Faculty of Physics and Astronomy, Ruhr-University Bochum (Germany), 6. Quantum-Phase Electronics Center, The University of Tokyo (Japan))

We investigate the competition between Kondo screening and RKKY interaction in a double quantum dot system. By tuning the Kondo cloud size, we reveal long-range spin coupling and a pronounced suppression of the Kondo resonance (G ≈ 0) at the off-resonance, indicating enhanced RKKY interaction over several micrometers.