Control of 3-dimensional nanostructures and quantum transport in low-dimensional graphite crystals

我们研究了纳米结构的制备及其在低维石墨晶体中的量子输运，如二维石墨烯和一维碳纳米管结构，面向未来具有新功能的量子纳米器件。在本研究中，我们建立了纳米加工工艺来控制低维石墨晶体的结构，并将纳米加工工艺应用于石墨烯，制备了由两个侧向量子点组成的耦合量子点器件。我们的实验结果表明，量子点中的电子数目、电子之间的耦合状态等性质都可以通过在所制作的量子器件中施加外部电压来人工控制。由于这项研究显示了使用新的碳材料开发集成纳米器件的潜力，因此有望为纳米量子器件的发展做出贡献。

We investigated the fabrication of nanostructures and its quantum transport in low-dimensional graphite crystals such as two-dimensional graphene and one-dimensional carbon nanotube structures toward future quantum nanodevices with novel functions. In this research, we established the nanofabrication process to control the structure of low-dimensional graphite crystals, and fabricated a coupled quantum dot device comprising two lateral quantum dots by applying a nanofabrication process to the graphene. Our experimental results indicate that the number of electrons in a quantum dot, the coupling state between the electrons, and other properties can be controlled artificially using external voltages in the fabricated quantum devices. Because this research shows the potential for development of integrated nanodevices using a new carbon material, it is expected to contribute to progress in the development of nano quantum devices.