Application of the Dot-Ring Nanostructure to Control Electrical Transport in the Coulomb Blockade Regime

• Authors: I. Janus-Zygmunt , B. Kędzierska , A. Gorczyca-Goraj , M. Kurpas , M. Maśka , E. Zipper
• Languages of publication: EN

Abstracts

EN

Transport properties of a two-dimensional nanostructure composed of a quantum dot surrounded by a quantum ring (dot-ring nanostructure), are discussed. This complex system is a highly controllable object. Conduction through dot-ring nanostructure depends crucially on the coupling strength of its states to the electrodes, which is related to the spatial distribution of the electron's wave functions in dot-ring nanostructure. This distribution can be strongly modified, e.g., by the electrical gating so that the ground and excited states move between the inner dot and the outer ring. In this paper we show that this property can be used to control single-electron DC current through dot-ring nanostructure in the Coulomb blockade regime so that it can be used as a single electron transistor.

Keywords

EN

73.23.Hk; 73.21.La; 73.22.-f

Discipline

• 73.23.Hk: Coulomb blockade; single-electron tunneling
• 73.22.-f: Electronic structure of nanoscale materials and related systems
• 73.21.La: Quantum dots

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2014
• Volume: 126
• Issue: 5
• Pages: 1171-1173

Dates

published

2014-11

Contributors

author

I. Janus-Zygmunt

• Department of Theoretical Physics Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland

author

B. Kędzierska

• Department of Theoretical Physics Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland

author

A. Gorczyca-Goraj

• Department of Theoretical Physics Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland

author

M. Kurpas

• Department of Theoretical Physics Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland

author

M. Maśka

• Department of Theoretical Physics Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland

author

E. Zipper

• Department of Theoretical Physics Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland

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Identifiers

DOI

10.12693/APhysPolA.126.1171