Jahn-Teller / Kondo Interplay in a Three-Terminal Quantum Dot
Ryan C. Toonen, Hua Qin, Andreas K. Huettel, Srijit Goswami, Daniel W. van der Weide, Karl Eberl, Robert H. Blick
Abstract
In quantum dot circuits, screening electron clouds in strongly-coupled leads will hybridize with the states of the artificial atom. Using a three-terminal geometry, we directly probe the atomic structure of a quantum dot with Kondo coupling. Our measurements reveal that this hybrid system behaves as a non-linear entity with orbital degeneracy. Geometric distortion reduces the symmetry, lowers the energy, and lifts the degeneracy--the Jahn-Teller effect.
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