Observation of the Kondo effect in a quadruple quantum dot

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2015-06-02

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© 2015 American Physical Society.We investigate the Kondo effect in a quadruple-quantum-dot device of coupled double quantum dots (DQDs), which simultaneously contain intra-DQD and inter-DQD coupling. A variety of novel behaviors are observed. The differential conductance dI/dV is measured in the upper DQDs as a function of source drain bias. It is found to exhibit multiple peaks, including a zero-bias peak, where the number of peaks exceeds five. Alternatively, tuning the lower DQDs yielded regions of four peaks. In addition, a Kondo effect switcher is demonstrated, using the lower DQDs as the controller.

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10.1103/PhysRevB.91.245102

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Shang, R, HO Li, G Cao, G Yu, M Xiao, T Tu, GC Guo, H Jiang, et al. (2015). Observation of the Kondo effect in a quadruple quantum dot. Physical Review B - Condensed Matter and Materials Physics, 91(24). 10.1103/PhysRevB.91.245102 Retrieved from https://hdl.handle.net/10161/11138.

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Chang

Albert M. Chang

Professor of Physics

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