Quantum-dot nanodevices with carbon nanotubes

作者：Koji Ishibashi, Satoshi Moriyama, Daiju Tsuya, T. Fuse, Masaki Suzuki · 发表于：Journal of Vacuum Science & Technology A Vacuum Surfaces and Films · 年份：2006 · DOI：10.1116/1.2201054 · 被引用次数：33 · 研究领域：Carbon Nanotubes in Composites、Quantum and electron transport phenomena、Graphene research and applications

We review our recent work on quantum-dot devices with carbon nanotubes. We conclude that the single-wall carbon nanotube quantum dot is an artificial atom with two- or four-electron shell structures. Zeeman splitting of single particle levels was observed, which is advantageous for the spin based quantum computing device (spin qubit) because the single spin is generated by putting one electron in the shell. Single-electron devices such as single-electron inverter and single-electron exclusive-OR gates have been fabricated, and their performance has been demonstrated at liquid-helium temperature. Despite the expected room-temperature operation from the single-electron charging energy, the operation temperature of our devices was limited to ∼10K because of the low height of the tunnel barrier.