Observation of the Kondo effect in a quadruple quantum dot
© 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.
Shang, R; Li, HO; Cao, G; Yu, G; Xiao, M; Tu, T; Guo, GC; Jiang, H; Chang, AM; Guo, GP
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