Observation of Inter-layer Excitons in MoSe2 Single Crystals

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

doi:10.1103/PhysRevB.97.241404

Observation of Inter-layer Excitons in MoSe2 Single Crystals

Materials Science 2018-06-13 v1

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

View on arXiv ↗ PDF ↗ DOI ↗

Abstract

Interlayer excitons are observed coexisting with intralayer excitons in bi-layer, 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, narrow linewidth of 20 meV, and 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.

Keywords

excitonic physics in transition metal dichalcogenides excitons in semiconductors atomic spectroscopy

Cite

@article{arxiv.1712.04485,
  title  = {Observation of Inter-layer Excitons in MoSe2 Single Crystals},
  author = {Jason Horng and Tineke Stroucken and Long Zhang and Eunice Y. Paik and Hui Deng and Stephan W. Koch},
  journal= {arXiv preprint arXiv:1712.04485},
  year   = {2018}
}

Observation of Inter-layer Excitons in MoSe2 Single Crystals

Abstract

Keywords

Cite

Related papers