Observation of a Biexciton Wigner Molecule by Fractional Optical Aharonov-Bohm Oscillations in a Single Quantum Ring

Hee Dae Kim, Rin Okuyama, Kwangseuk Kyhm, Mikio Eto, Robert A. Taylor, Aurelien L. Nicolet, Marek Potemski, Gilles Nogues, Le Si Dang, Ku Chul Je, Jongsu Kim, Ji Hoon Kyhm, Kyu Hyoek Yoen, Eun Hye Lee, Jun Young Kim, Il Ki Han, Wonjun Choi, Jindong Song

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

(Graph Presented) The Aharonov-Bohm effect in ring structures in the presence of electronic correlation and disorder is an open issue. We report novel oscillations of a strongly correlated exciton pair, similar to a Wigner molecule, in a single nanoquantum ring, where the emission energy changes abruptly at the transition magnetic field with a fractional oscillation period compared to that of the exciton, a so-called fractional optical Aharonov-Bohm oscillation. We have also observed modulated optical Aharonov-Bohm oscillations of an electron-hole pair and an anticrossing of the photoluminescence spectrum at the transition magnetic field, which are associated with disorder effects such as localization, built-in electric field, and impurities.

Original languageEnglish
Pages (from-to)27-33
Number of pages7
JournalNano Letters
Volume16
Issue number1
DOIs
Publication statusPublished - 2016 Jan 13

Keywords

  • biexciton
  • disorder effect
  • exciton
  • Optical Aharonov-Bohm effect
  • quantum ring
  • Wigner molecule

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanical Engineering

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  • Cite this

    Kim, H. D., Okuyama, R., Kyhm, K., Eto, M., Taylor, R. A., Nicolet, A. L., Potemski, M., Nogues, G., Dang, L. S., Je, K. C., Kim, J., Kyhm, J. H., Yoen, K. H., Lee, E. H., Kim, J. Y., Han, I. K., Choi, W., & Song, J. (2016). Observation of a Biexciton Wigner Molecule by Fractional Optical Aharonov-Bohm Oscillations in a Single Quantum Ring. Nano Letters, 16(1), 27-33. https://doi.org/10.1021/acs.nanolett.5b02419