Charge states of a collinearly and laterally coupled vertical triple quantum dot device

Shinichi Amaha; Tsuyoshi Hatano; Hiroyuki Tamura; Toshihiro Kubo; Soichiro Teraoka; Yasuhiro Tokura; David Guy Austing; Seigo Tarucha

doi:10.1016/j.physe.2009.11.023

Charge states of a collinearly and laterally coupled vertical triple quantum dot device

Shinichi Amaha, Tsuyoshi Hatano, Hiroyuki Tamura, Toshihiro Kubo, Soichiro Teraoka, Yasuhiro Tokura, David Guy Austing, Seigo Tarucha

SCI - Physics

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

Three laterally coupled vertical single quantum dots (tQDs) in a collinear arrangement, with common source and drain electrodes, are investigated. The tQDs are formed inside three connected pillars (mesa1, mesa2, mesa3) with four side gate electrodes (G1, G2 (G2'), G3). Three families of Coulomb oscillation lines corresponding to charges in the numbers of electrons in the three dots are observed, and the few-electron charge configurations can be assigned. We also discuss the separation of adjacent Coulomb peak lines in the stability diagram, indicating that the inter-dot Coulomb energy between adjacent dots (mesa1-mesa2 and mesa2-mesa3) is significantly larger than that between the two non-adjacent dots (mesa1-mesa3).

Original language	English
Pages (from-to)	899-901
Number of pages	3
Journal	Physica E: Low-Dimensional Systems and Nanostructures
Volume	42
Issue number	4
DOIs	https://doi.org/10.1016/j.physe.2009.11.023
Publication status	Published - 2010 Feb

Keywords

Quantum dot molecules
Quantum dots
Stability diagram
Triple quantum dots

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Condensed Matter Physics

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Charge states of a collinearly and laterally coupled vertical triple quantum dot device. / Amaha, Shinichi; Hatano, Tsuyoshi; Tamura, Hiroyuki; Kubo, Toshihiro; Teraoka, Soichiro; Tokura, Yasuhiro; Austing, David Guy; Tarucha, Seigo.

In: Physica E: Low-Dimensional Systems and Nanostructures, Vol. 42, No. 4, 02.2010, p. 899-901.

Research output: Contribution to journal › Article › peer-review

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abstract = "Three laterally coupled vertical single quantum dots (tQDs) in a collinear arrangement, with common source and drain electrodes, are investigated. The tQDs are formed inside three connected pillars (mesa1, mesa2, mesa3) with four side gate electrodes (G1, G2 (G2'), G3). Three families of Coulomb oscillation lines corresponding to charges in the numbers of electrons in the three dots are observed, and the few-electron charge configurations can be assigned. We also discuss the separation of adjacent Coulomb peak lines in the stability diagram, indicating that the inter-dot Coulomb energy between adjacent dots (mesa1-mesa2 and mesa2-mesa3) is significantly larger than that between the two non-adjacent dots (mesa1-mesa3).",

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author = "Shinichi Amaha and Tsuyoshi Hatano and Hiroyuki Tamura and Toshihiro Kubo and Soichiro Teraoka and Yasuhiro Tokura and Austing, {David Guy} and Seigo Tarucha",

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AU - Amaha, Shinichi

AU - Hatano, Tsuyoshi

AU - Tamura, Hiroyuki

AU - Kubo, Toshihiro

AU - Teraoka, Soichiro

AU - Tokura, Yasuhiro

AU - Austing, David Guy

AU - Tarucha, Seigo

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AB - Three laterally coupled vertical single quantum dots (tQDs) in a collinear arrangement, with common source and drain electrodes, are investigated. The tQDs are formed inside three connected pillars (mesa1, mesa2, mesa3) with four side gate electrodes (G1, G2 (G2'), G3). Three families of Coulomb oscillation lines corresponding to charges in the numbers of electrons in the three dots are observed, and the few-electron charge configurations can be assigned. We also discuss the separation of adjacent Coulomb peak lines in the stability diagram, indicating that the inter-dot Coulomb energy between adjacent dots (mesa1-mesa2 and mesa2-mesa3) is significantly larger than that between the two non-adjacent dots (mesa1-mesa3).

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KW - Stability diagram

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