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Fabrication and Characterization of GaAs Single Electron Devices Having Single and Multiple Dots Based on Schottky In-Plane-Gate and Wrap-Gate Control of Two-Dimensional Electron Gas

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Title: Fabrication and Characterization of GaAs Single Electron Devices Having Single and Multiple Dots Based on Schottky In-Plane-Gate and Wrap-Gate Control of Two-Dimensional Electron Gas
Authors: Kasai, Seiya Browse this author →KAKEN DB
Jinushi, Kei-ichiroh Browse this author
Tomozawa, Hidemasa Browse this author
Hasegawa, Hideki Browse this author
Keywords: single electron transistors
Schottky in-plane gate (IPG)
Schottky wrap gate (WPG)
single-quantum dot
multiple-quantum dot
Coulomb blockade
Issue Date: Mar-1997
Publisher: Japan Society of Applied Physics
Journal Title: Japanese Journal of Applied Physics. Pt. 1, Regular papers, short notes & review papers
Volume: 36
Issue: 3B
Start Page: 1678
End Page: 1685
Publisher DOI: 10.1143/JJAP.36.1678
Abstract: Single-dot and multiple (2, 3, 18, and 37)-dot single electron transistors (SETs) based on the control of a two-dimensional electron gas (2DEG) with a recently proposed Schottky in-plane gate (IPG) and a newly introduced Schottky wrap gate (WPG) were successfully fabricated on AlGaAs/GaAs wafers using electron beam (EB) lithography and their transport properties were investigated. Each of the fabricated SETs showed Coulomb blockade-like conductance oscillation. In single-dot SETs, a strong correlation was found between the device dimensions and the temperature limit of conductance oscillation. Conductance oscillation characteristics of multiple-dot SETs were complicated, and were not explained by the classical Coulomb blockade theory. Based on a simplified theoretical analysis using computer simulation, it was shown that quantized energy due to electron confinement and dot-coupling can dominate the charging effect in the fabricated SETs.
Rights: Copyright © 1997 The Japan Society of Applied Physics
Type: article (author version)
URI: http://hdl.handle.net/2115/33085
Appears in Collections:情報科学院・情報科学研究院 (Graduate School of Information Science and Technology / Faculty of Information Science and Technology) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 葛西 誠也

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