Electronic transport properties of coupled quantum dots on carbon nanotubes.
We investigate the electronic transport properties of coupled quantum dots, controlled by local gates on carbon nanotubes. The inter-dot coupling can be tuned from weak to strong by changing gate voltages, and oscillates in short and long period with the distance between two gates. We introduce a one-dimensional scattering model to describe the mechanism of the electron transport through the carbon nanotube quantum dots. We show that pi and PI* channels contribute differently to the inter-dot coupling and the transport phase plays a key role in the oscillations of the coupling.
Department of Physics, Tsinghua University, Beijing 100084, China.
Haiyun
H
Qian
Jun-Qiang
JQ
Lu