Mason N, Biercuk M J, Marcus C M
Department of Physics, Harvard University Cambridge, MA 02138, USA.
Science. 2004 Jan 30;303(5658):655-8. doi: 10.1126/science.1093605.
We have measured carbon nanotube quantum dots with multiple electrostatic gates and used the resulting enhanced control to investigate a nanotube double quantum dot. Transport measurements reveal honeycomb charge stability diagrams as a function of two nearly independent gate voltages. The device can be tuned from weak to strong interdot tunnel-coupling regimes, and the transparency of the leads can be controlled independently. We extract values of energy-level spacings, capacitances, and interaction energies for this system. This ability to control electron interactions in the quantum regime in a molecular conductor is important for applications such as quantum computation.
我们使用多个静电栅极测量了碳纳米管量子点，并利用由此增强的控制来研究一个纳米管双量子点。输运测量揭示了作为两个近乎独立栅极电压函数的蜂窝状电荷稳定性图。该器件可以从弱的点间隧道耦合 regime 调谐到强的 regime，并且引线的透明度可以独立控制。我们提取了该系统的能级间距、电容和相互作用能的值。在分子导体的量子 regime 中控制电子相互作用的这种能力对于量子计算等应用很重要。
