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Tunable 0.7 conductance plateau in quantum dots

机译:量子点中可调谐的0.7电导平台

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摘要

A consistent approach in forming the 0.7 structure by using a quantum dot rather than a quantum point contact is demonstrated. With this scheme, it was possible to tune on and off the 0.7 structure. The 0.7 structure continuously evolved into a normal integer conductance plateau by varying the tuning condition. Unlike the conventional 0.7 plateau, the new 0.7 structure was observed even at low electron temperatures down to 100 mK, with unprecedented flatness. From our results, it is concluded that electron interference should be taken into consideration to explain the 0.7 structure.
机译:演示了通过使用量子点而不是量子点接触形成0.7结构的一致方法。通过此方案,可以调优0.7结构。通过改变调谐条件,0.7结构连续演变为正整数电导平台。与传统的0.7平稳区不同,即使在低至100 mK的低电子温度下也能观察到新的0.7结构,具有前所未有的平坦度。从我们的结果可以得出结论,应该考虑电子干扰来解释0.7结构。

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