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Hatano T, Stopa M, Yamaguchi T, et al. Electron-spin and electron-orbital dependence of the tunnel coupling in laterally coupled double vertical dots. Phys Rev Lett. 2004;93(6):066806doi: 10.1103/PhysRevLett.93.066806.
Hatano, T., Stopa, M., Yamaguchi, T., Ota, T., Yamada, K., & Tarucha, S. (2004). Electron-spin and electron-orbital dependence of the tunnel coupling in laterally coupled double vertical dots. Physical review letters, 93(6), 066806. https://doi.org/10.1103/PhysRevLett.93.066806
Hatano, T, et al. "Electron-spin and electron-orbital dependence of the tunnel coupling in laterally coupled double vertical dots." Physical review letters vol. 93,6 (2004): 066806. doi: https://doi.org/10.1103/PhysRevLett.93.066806
Hatano T, Stopa M, Yamaguchi T, Ota T, Yamada K, Tarucha S. Electron-spin and electron-orbital dependence of the tunnel coupling in laterally coupled double vertical dots. Phys Rev Lett. 2004 Aug 06;93(6):066806. doi: 10.1103/PhysRevLett.93.066806. Epub 2004 Aug 06. PMID: 15323653.
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Phys Rev Lett. 2004 Aug 06;93(6):066806. doi: 10.1103/PhysRevLett.93.066806. Epub 2004 Aug 06.

Electron-spin and electron-orbital dependence of the tunnel coupling in laterally coupled double vertical dots.

Physical review letters

T Hatano, M Stopa, T Yamaguchi, T Ota, K Yamada, S Tarucha

Affiliations

  1. Tarucha Mesoscopic Correlation Project, ERATO, JST, Atsugi-shi, Kanagawa 243-0198, Japan. [email protected]

PMID: 15323653 DOI: 10.1103/PhysRevLett.93.066806

Abstract

We employ a new laterally coupled, vertical double dot with a tunable tunnel-coupling gate in a parallel configuration to study the electron spin and orbital dependence of quantum mechanical tunnel coupling on the size of the honeycomb vertices in the small electron numbers regime. We find a transition from the weak coupling regime, where fluctuations in tunnel coupling due to varying electron configuration dominate the anticrossings, to a regime where the two dots coalesce. We apply a magnetic field to ascertain the orbital angular momenta of the Fermi surface eigenstates, which correlate with anticrossing size, and we identify spin pairs with congruent behavior.

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