Single-electron tunneling and Coulomb blockade in carbon-based quantum dots

doi:10.1007/s11467-009-0023-9

Frontiers of Physics

2009, Vol. 4

Issue (3): 315-326 https://doi.org/10.1007/s11467-009-0023-9

本期目录

Single-electron tunneling and Coulomb blockade in carbon-based quantum dots

Wei FAN (樊巍)^1,2, Rui-qin ZHANG (张瑞勤)^1,3(

)

1. Nano-organic Photoelectronic Laboratory, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China; 2. Graduate University of Chinese Academy of Sciences, Beijing 100190, China; 3. Center of Super-diamond and Advanced Films and Department of Physics & Materials Science, City University of Hong Kong, Hong Kong Special Administrative Region, China

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Abstract：

Single-electron tunneling (SET) and Coulomb blockade (CB) phenomena have been widely observed in nanoscaled electronics and have received intense attention around the world. In the past few years, we have studied SET in carbon nanotube fragments and fullerenes by applying the so-called “Orthodox” theory [28]. As outlined in this review article, we investigated the single-electron charging and discharging process via current-voltage characteristics, gate effect, and electronic structure-related factors. Because the investigated geometric structures are three-dimensionally confined, resulting in a discrete spectrum of energy levels resembling the property of quantum dots, we evidenced the CB and Coulomb staircases in these structures. These nanostructures are sufficiently small that introducing even a single electron is sufficient to dramatically change the transport properties as a result of the charging energy associated with this extra electron. We found that the Coulomb staircases occur in the I-V characteristics only when the width of the left barrier junction is smaller than that of the right barrier junction. In this case, the transmission coefficient of the emitter junction is larger than that of the collector junction; also, occupied levels enter the bias window, thereby enhancing the tunneling extensively.

Key words： single-electron tunneling (SET) Coulomb blockade (CB) Coulomb staircase carbon nanotube (CNT) fullerene Orthodox theory

收稿日期: 2009-01-20 出版日期: 2009-09-05

Corresponding Author(s): null,Email:aprqz@cityu.edu.hk

引用本文:

. Single-electron tunneling and Coulomb blockade in carbon-based quantum dots[J]. Frontiers of Physics, 2009, 4(3): 315-326.
Wei FAN (樊巍), Rui-qin ZHANG (张瑞勤). Single-electron tunneling and Coulomb blockade in carbon-based quantum dots. Front. Phys. , 2009, 4(3): 315-326.

链接本文:

https://academic.hep.com.cn/fop/CN/10.1007/s11467-009-0023-9
https://academic.hep.com.cn/fop/CN/Y2009/V4/I3/315

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