TY - JOUR
T1 - Charge states of a collinearly and laterally coupled vertical triple quantum dot device
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
N1 - Funding Information:
The authors thank T. Maruyama, T. Kodera, K. Ono, T. Takakura, R. Sakano, Y. Nishikawa, A. Oguri and S. Sasaki for fruitful help, discussions and comments. This work was financially supported by Grants-in-Aid for Scientific Research S (no. 19104007 ), B (no. 18340081 ) and by Special Coordination Funds for Promoting Science and Technology . S. T. acknowledges support from QuEST program ( BAA-0824 ).
PY - 2010/2
Y1 - 2010/2
N2 - 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).
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).
KW - Quantum dot molecules
KW - Quantum dots
KW - Stability diagram
KW - Triple quantum dots
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U2 - 10.1016/j.physe.2009.11.023
DO - 10.1016/j.physe.2009.11.023
M3 - Article
AN - SCOPUS:76949087427
VL - 42
SP - 899
EP - 901
JO - Physica E: Low-Dimensional Systems and Nanostructures
JF - Physica E: Low-Dimensional Systems and Nanostructures
SN - 1386-9477
IS - 4
ER -