Spatially resolved manipulation of single electrons in quantum dots using a scanned probe
Spatially resolved manipulation of single electrons in quantum dots using a scanned probe
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DOI：
10.1103/physrevlett.93.216801
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发表时间：
2004-11-19
影响因子：
8.6
通讯作者：
Wegscheider, W
中科院分区：
文献类型：
--
作者：
Pioda, A;Kicin, S;Wegscheider, W
在300 mK的温度下，将扫描力显微镜的扫描金属尖端电容耦合到限制在光刻限定的栅极可调量子点中的电子。通过移动针尖或改变针尖偏置电压，利用库仑阻塞效应使单电子在点上跳跃或跳跃。电导共振的空间图像映射尖端和单个电子量子点状态之间的相互作用势。在一定条件下，这种相互作用被发现包含尖端电压诱导和尖端电压无关的贡献。
The scanning metallic tip of a scanning force microscope was coupled capacitively to electrons confined in a lithographically defined gate-tunable quantum dot at a temperature of 300 mK. Single electrons were made to hop on or off the dot by moving the tip or by changing the tip bias voltage owing to the Coulomb-blockade effect. Spatial images of conductance resonances map the interaction potential between the tip and individual electronic quantum dot states. Under certain conditions this interaction is found to contain a tip-voltage induced and a tip-voltage-independent contribution.