From the Coulomb blockade regime to the Non-Coulomb blockade regime

被引：2

作者：

Wang, Miao ^{[1
]}

Wu, Reng-lai ^{[1
]}

Yu, Yabin ^{[1
]}

Huang, Wei-qing ^{[1
]}

Ma, Zheng ^{[1
]}

机构：

[1] Hunan Univ, Sch Phys & Microelect Sci, Changsha 410082, Hunan, Peoples R China

来源：

PHYSICA B-CONDENSED MATTER | 2014年 / 454卷

关键词：

Coulomb blockade; Quantum dot; Molecular device; QUANTUM DOT SYSTEM; TUNNEL-JUNCTIONS; TRANSPORT; OSCILLATIONS; NANOTUBE; LEADS; WIRE;

D O I：

10.1016/j.physb.2014.07.061

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The investigations on the Coulomb blockade (CB) effect, which strongly affects the transport properties of the quantum devices, are generally restricted to the regime where the Coulomb repulsion U is far larger than the temperature T, yet the critical status was not discussed. We represent the boundary between the CB and Non-CB regimes with the nonequilibrium Green's function approach based on the equation of motion by employing a quantum dot model. The boundary line can be expressed with a equation Gamma/U = f(T/U), and then the systems will be in CB regime when Gamma/U < f(T/U). Thus, this boundary allows us to easily know when the CB effect is significant in the electronic device investigations. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：82 / 85

页数：4

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