Observation of interlayer excitons in MoSe2 single crystals

Jason Horng, Tineke Stroucken, Long Zhang, Eunice Y. Paik, Hui Deng, Stephan W Koch

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Interlayer excitons with direct optical transitions are observed coexisting with intralayer excitons in the same K valleys in bilayer, few-layer, and bulk MoSe2 single crystals by confocal reflection contrast spectroscopy. Quantitative analysis using the Dirac-Bloch equations provides unambiguous state assignment of all the measured resonances. The interlayer excitons in bilayer MoSe2 have a large binding energy of 153 meV and a narrow linewidth of 20 meV. Their spectral weight is comparable to the commonly studied higher-order intralayer excitons. At the same time, the interlayer excitons are characterized by distinct transition energies and permanent dipole moments, providing a promising high temperature and optically accessible platform for dipolar exciton physics.

Original languageEnglish (US)
Article number241404
JournalPhysical Review B
Volume97
Issue number24
DOIs
StatePublished - Jun 7 2018
Externally publishedYes

Fingerprint

Excitons
interlayers
excitons
Single crystals
single crystals
State assignment
Optical transitions
Dipole moment
Electron transitions
Binding energy
optical transition
Linewidth
quantitative analysis
valleys
LDS 751
dipole moments
Physics
platforms
binding energy
Spectroscopy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Horng, J., Stroucken, T., Zhang, L., Paik, E. Y., Deng, H., & Koch, S. W. (2018). Observation of interlayer excitons in MoSe2 single crystals. Physical Review B, 97(24), [241404]. https://doi.org/10.1103/PhysRevB.97.241404

Observation of interlayer excitons in MoSe2 single crystals. / Horng, Jason; Stroucken, Tineke; Zhang, Long; Paik, Eunice Y.; Deng, Hui; Koch, Stephan W.

In: Physical Review B, Vol. 97, No. 24, 241404, 07.06.2018.

Research output: Contribution to journalArticle

Horng, J, Stroucken, T, Zhang, L, Paik, EY, Deng, H & Koch, SW 2018, 'Observation of interlayer excitons in MoSe2 single crystals', Physical Review B, vol. 97, no. 24, 241404. https://doi.org/10.1103/PhysRevB.97.241404
Horng, Jason ; Stroucken, Tineke ; Zhang, Long ; Paik, Eunice Y. ; Deng, Hui ; Koch, Stephan W. / Observation of interlayer excitons in MoSe2 single crystals. In: Physical Review B. 2018 ; Vol. 97, No. 24.
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