TY - JOUR
T1 - Observation of anti-bonding excited state in charging diagram of a few-electron double dot
AU - Hatano, Tsuyoshi
AU - Tokura, Yasuhiro
AU - Amaha, Shinichi
AU - Kubo, Toshihiro
AU - Tarucha, Seigo
N1 - Funding Information:
We thank S. Teraoka, A. Shibatomi, K. Ono, S. Sasaki, D.G. Austing and M. Stopa for experimental help and useful discussions. Part of this work is financially supported by the grant-in-aid for Scientific Research S (No. 19104007), B (No. 18340081), SORST-JST, Special Coordination Funds for Promoting Science and Technology, MEXT.
PY - 2008/3
Y1 - 2008/3
N2 - We fabricated a unique hybrid vertical-lateral double dot device with two dots coupled in parallel to study the excitation energy spectra with the number of electrons in each dot and inter-dot level detuning as parameters. We measured the charging diagram for a finite bias voltage and observed the tunnel-coupled bonding state and anti-bonding state. The separation between the two states is a direct measure of the inter-dot tunnel coupling energy. We use this energy and other characteristic energies derived from the charging diagram to characterize the exchange interaction energy.
AB - We fabricated a unique hybrid vertical-lateral double dot device with two dots coupled in parallel to study the excitation energy spectra with the number of electrons in each dot and inter-dot level detuning as parameters. We measured the charging diagram for a finite bias voltage and observed the tunnel-coupled bonding state and anti-bonding state. The separation between the two states is a direct measure of the inter-dot tunnel coupling energy. We use this energy and other characteristic energies derived from the charging diagram to characterize the exchange interaction energy.
KW - Bonding and anti-bonding states
KW - Ground and excited states
KW - Tunnel coupling
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U2 - 10.1016/j.physe.2007.08.062
DO - 10.1016/j.physe.2007.08.062
M3 - Article
AN - SCOPUS:39649109659
VL - 40
SP - 1238
EP - 1240
JO - Physica E: Low-Dimensional Systems and Nanostructures
JF - Physica E: Low-Dimensional Systems and Nanostructures
SN - 1386-9477
IS - 5
ER -