Rectifying behavior in laterally coupled self-assembled quantum dots with asymmetric tunneling barriers

Shinichi Amaha; Toshihiro Kubo; Tsuyoshi Hatano; Soichiro Teraoka; Akihiro Shibatomi; Yasuhiro Tokura; Seigo Tarucha

doi:10.1143/APEX.2.014501

Rectifying behavior in laterally coupled self-assembled quantum dots with asymmetric tunneling barriers

Shinichi Amaha, Toshihiro Kubo, Tsuyoshi Hatano, Soichiro Teraoka, Akihiro Shibatomi, Yasuhiro Tokura, Seigo Tarucha

SCI - Physics

Research output: Contribution to journal › Article

Abstract

We use laterally coupled two self-assembled quantum dots (QDs) to study the effect of asymmetric coupling to the source and drain electrodes. From the measured stability diagram, we confirm that one QD (Dot 1 ) is tunnel-coupled to the two electrodes, whereas the other (Dot 2) is only tunnel-coupled to one electrode. We observe the asymmetric current-voltage characteristics, when Dot 2 acts as an electron trap only for one bias polarity to impede the electron flow through Dot 1 due to the inter-dot Coulomb coupling. This phenomenon can be understood within the scheme of charge ratchet effect.

Original language	English
Pages (from-to)	145011-145013
Number of pages	3
Journal	Applied Physics Express
Volume	2
Issue number	1
DOIs	https://doi.org/10.1143/APEX.2.014501
Publication status	Published - 2009 Jan 1

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

Access to Document

10.1143/APEX.2.014501

Fingerprint Dive into the research topics of 'Rectifying behavior in laterally coupled self-assembled quantum dots with asymmetric tunneling barriers'. Together they form a unique fingerprint.

Cite this

Amaha, S., Kubo, T., Hatano, T., Teraoka, S., Shibatomi, A., Tokura, Y., & Tarucha, S. (2009). Rectifying behavior in laterally coupled self-assembled quantum dots with asymmetric tunneling barriers. Applied Physics Express, 2(1), 145011-145013. https://doi.org/10.1143/APEX.2.014501

@article{c15444af7b7c42c3b84a6877ab6f4073,

title = "Rectifying behavior in laterally coupled self-assembled quantum dots with asymmetric tunneling barriers",

abstract = "We use laterally coupled two self-assembled quantum dots (QDs) to study the effect of asymmetric coupling to the source and drain electrodes. From the measured stability diagram, we confirm that one QD (Dot 1 ) is tunnel-coupled to the two electrodes, whereas the other (Dot 2) is only tunnel-coupled to one electrode. We observe the asymmetric current-voltage characteristics, when Dot 2 acts as an electron trap only for one bias polarity to impede the electron flow through Dot 1 due to the inter-dot Coulomb coupling. This phenomenon can be understood within the scheme of charge ratchet effect.",

author = "Shinichi Amaha and Toshihiro Kubo and Tsuyoshi Hatano and Soichiro Teraoka and Akihiro Shibatomi and Yasuhiro Tokura and Seigo Tarucha",

year = "2009",

month = jan,

day = "1",

doi = "10.1143/APEX.2.014501",

language = "English",

volume = "2",

pages = "145011--145013",

journal = "Applied Physics Express",

issn = "1882-0778",

publisher = "Japan Society of Applied Physics",

number = "1",

}

TY - JOUR

T1 - Rectifying behavior in laterally coupled self-assembled quantum dots with asymmetric tunneling barriers

AU - Amaha, Shinichi

AU - Kubo, Toshihiro

AU - Hatano, Tsuyoshi

AU - Teraoka, Soichiro

AU - Shibatomi, Akihiro

AU - Tokura, Yasuhiro

AU - Tarucha, Seigo

PY - 2009/1/1

Y1 - 2009/1/1

N2 - We use laterally coupled two self-assembled quantum dots (QDs) to study the effect of asymmetric coupling to the source and drain electrodes. From the measured stability diagram, we confirm that one QD (Dot 1 ) is tunnel-coupled to the two electrodes, whereas the other (Dot 2) is only tunnel-coupled to one electrode. We observe the asymmetric current-voltage characteristics, when Dot 2 acts as an electron trap only for one bias polarity to impede the electron flow through Dot 1 due to the inter-dot Coulomb coupling. This phenomenon can be understood within the scheme of charge ratchet effect.

AB - We use laterally coupled two self-assembled quantum dots (QDs) to study the effect of asymmetric coupling to the source and drain electrodes. From the measured stability diagram, we confirm that one QD (Dot 1 ) is tunnel-coupled to the two electrodes, whereas the other (Dot 2) is only tunnel-coupled to one electrode. We observe the asymmetric current-voltage characteristics, when Dot 2 acts as an electron trap only for one bias polarity to impede the electron flow through Dot 1 due to the inter-dot Coulomb coupling. This phenomenon can be understood within the scheme of charge ratchet effect.

UR - http://www.scopus.com/inward/record.url?scp=58449133397&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=58449133397&partnerID=8YFLogxK

U2 - 10.1143/APEX.2.014501

DO - 10.1143/APEX.2.014501

M3 - Article

AN - SCOPUS:58449133397

VL - 2

SP - 145011

EP - 145013

JO - Applied Physics Express

JF - Applied Physics Express

SN - 1882-0778

IS - 1

ER -