Topological transition by dielectric control of exciton wavefunction in thin nanotube structure

Masami Kumagai, Toshihide Takagahara, Kousuke Yakubo

Research output: Contribution to journalArticle


Dielectric control of the topology of an exciton wavefunction is proposed and investigated theoretically. As we have shown in a previous paper, we can change the topology of an exciton wavefunction in a nanotube structure by controlling the length and radius of the nanotube. This nature yields a new device which utilizes the topology of an exciton wavefunction, however, its control via the structural parameters does not suit it to device applications. We found that the in-situ control can be achieved by changing the ambient dielectric constants of the nanotube structure and we calculated the transition condition of the topology of an exciton wavefunction.

Original languageEnglish
Pages (from-to)663-666
Number of pages4
JournalSolid State Communications
Issue number9
Publication statusPublished - 2011 May 1



  • C. Nanotube
  • C. Topology
  • D. Exciton

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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