Dipolar and charged localized excitons in carbon nanotubes

Jan T. Glückert, Lyudmyla Adamska, Wolfgang Schinner, Matthias S. Hofmann, Stephen K. Doorn, Sergei Tretiak, Alexander Högele

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

We study both experimentally and theoretically the fundamental interplay of exciton localization and polarization in semiconducting single-walled carbon nanotubes. From Stark spectroscopy of individual carbon nanotubes at cryogenic temperatures, we identify localized excitons as permanent electric dipoles with dipole moments of up to 1eÅ. Moreover, we demonstrate field-effect doping of localized excitons with an additional charge which results in defect-localized trions. Our findings, in qualitative agreement with theoretical calculations, not only provide fundamental insight into the microscopic nature of localized excitons in carbon nanotubes, they also signify their potential for sensing applications and may serve as guidelines for molecular engineering of exciton-localizing quantum dots in other atomically thin semiconductors including transition metal dichalcogenides.

Original languageEnglish
Article number195413
JournalPhysical Review B
Volume98
Issue number19
DOIs
Publication statusPublished - 12 Nov 2018
Externally publishedYes

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