Liang Wenjie, Bockrath Marc, Park Hongkun
Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, USA.
Phys Rev Lett. 2002 Mar 25;88(12):126801. doi: 10.1103/PhysRevLett.88.126801. Epub 2002 Mar 6.
We report the characterization of electronic shell filling in metallic single-walled carbon nanotubes by low-temperature transport measurements. Nanotube quantum dots with average conductance approximately (1-2)e(2)/h exhibit a distinct four-electron periodicity for electron addition as well as signatures of Kondo and inelastic cotunneling. The Hartree-Fock parameters that govern the electronic structure of metallic nanotubes are determined from the analysis of transport data using a shell-filling model that incorporates the nanotube band structure and Coulomb and exchange interactions.
我们通过低温输运测量报告了金属性单壁碳纳米管中电子壳层填充的特征。平均电导约为(1 - 2)e²/h的纳米管量子点在电子添加时表现出独特的四电子周期性以及近藤效应和非弹性共隧穿的特征。通过使用包含纳米管能带结构以及库仑和交换相互作用的壳层填充模型对输运数据进行分析，确定了控制金属性纳米管电子结构的哈特里 - 福克参数。
