Capacitively-coupled and inductively-coupled excitons in bilayer MoS$_2$

Lukas Sponfeldner; Nadine Leisgang; Shivangi Shree; Ioannis Paradisanos; Kenji Watanabe; Takashi Taniguchi; Cedric Robert; Delphine Lagarde; Andrea Balocchi; Xavier Marie; Iann C. Gerber; Bernhard Urbaszek; Richard J. Warburton

doi:10.1103/PhysRevLett.129.107401

Capacitively-coupled and inductively-coupled excitons in bilayer MoS$_2$

Mesoscale and Nanoscale Physics 2022-09-14 v1

Authors: Lukas Sponfeldner , Nadine Leisgang , Shivangi Shree , Ioannis Paradisanos , Kenji Watanabe , Takashi Taniguchi , Cedric Robert , Delphine Lagarde , Andrea Balocchi , Xavier Marie , Iann C. Gerber , Bernhard Urbaszek , Richard J. Warburton

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Abstract

The interaction of intralayer and interlayer excitons is studied in a two-dimensional semiconductor, homobilayer MoS $_2$ . It is shown that the measured optical susceptibility reveals both the magnitude and the sign of the coupling constants. The interlayer exciton interacts capacitively with the intralayer B-exciton (positive coupling constant) consistent with hole tunnelling from one monolayer to the other. Conversely, the interlayer exciton interacts inductively with the intralayer A-exciton (negative coupling constant). First-principles many-body calculations show that this coupling arises via an intravalley exchange-interaction of A- and B-excitons.

Keywords

interlayer excitons intralayer excitons bilayer MoS2 capacitive coupling inductive coupling exchange interaction

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@article{arxiv.2108.04248,
  title  = {Capacitively-coupled and inductively-coupled excitons in bilayer MoS$_2$},
  author = {Lukas Sponfeldner and Nadine Leisgang and Shivangi Shree and Ioannis Paradisanos and Kenji Watanabe and Takashi Taniguchi and Cedric Robert and Delphine Lagarde and Andrea Balocchi and Xavier Marie and Iann C. Gerber and Bernhard Urbaszek and Richard J. Warburton},
  journal= {arXiv preprint arXiv:2108.04248},
  year   = {2022}
}

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Main text: 6 pages, 4 figures; Supplementary Information: 17 pages, 15 figures

Capacitively-coupled and inductively-coupled excitons in bilayer MoS$_2$

Abstract

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