Molecular states observed in a single pair of strongly coupled self-assembled InAs quantum dots

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dc.creatorOta, T.
dc.creatorStopa, M.
dc.creatorRontani, M.
dc.creatorHatano, T.
dc.creatorYamada, K.
dc.creatorTarucha, S.
dc.creatorSong, H. Z.
dc.creatorNakata, Y.
dc.creatorMiyazawa, T.
dc.creatorOhshima, T.
dc.creatorYokoyama, N.
dc.date2004-01-28
dc.date.accessioned2026-07-07T02:56:09Z
dc.date.available2026-07-07T02:56:09Z
dc.descriptionMolecular states in a SINGLE PAIR of strongly coupled self-assembled InAs quantum dots are investigated using a sub-micron sized single electron transistor containing just a few pairs of coupled InAs dots embedded in a GaAs matrix. We observe a series of well-formed Coulomb diamonds with charging energy of less than 5 meV, which are much smaller than those reported previously. This is because electrons are occupied in molecular states, which are spread over both dots and occupy a large volume. In the measurement of ground and excited state single electron transport spectra with magnetic field, we find that the electrons are sequentially trapped in symmetric and anti-symmetric states. This result is well-explained by numerical calculation using an exact diagonalization method.
dc.descriptionPDF file only. 10 pages, 3 figures. In press on Superlattices and Microstructures. Proceedings of 6-th International Conference on New Phenomena in Mesoscopic Systems and 4-th International Conference on Surfaces and Interfaces of Mesoscopic Devices, 1-5 December 2003, Maui, Hawaii
dc.identifierhttps://arxiv.org/abs/cond-mat/0401576
dc.identifierhttp://arxiv.org/abs/cond-mat/0401576
dc.identifierSuperlattices and Microstructures, Vol. 34, Issues 3-6, p. 159 (2003)
dc.identifierdoi:10.1016/j.spmi.2004.03.003
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/23209
dc.subjectMesoscale and Nanoscale Physics
dc.subjectStrongly Correlated Electrons
dc.titleMolecular states observed in a single pair of strongly coupled self-assembled InAs quantum dots
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