2020
DOI: 10.1038/s41563-020-0661-4
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Dipolar interactions between localized interlayer excitons in van der Waals heterostructures

Abstract: While photons in free space barely interact, matter can mediate interactions between them resulting in optical nonlinearities. Such interactions at the single-quantum level result in an on-site photon repulsion [1, 2], crucial for photon-based quantum information processing and for realizing strongly interacting many-body states of light [3][4][5][6][7]. Here, we report repulsive dipole-dipole interactions between electric field tuneable, localized interlayer excitons in MoSe 2 /WSe 2 heterobilayer. The presen… Show more

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Cited by 139 publications
(148 citation statements)
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“…After preparation and submission of the paper, we became aware of similar results by another group 46 .…”
Section: Modelling Interactions In Multi-exciton Complexesmentioning
confidence: 67%
“…After preparation and submission of the paper, we became aware of similar results by another group 46 .…”
Section: Modelling Interactions In Multi-exciton Complexesmentioning
confidence: 67%
“…From the linear fit of the energy shift versus electric field, the dipole size or charge separation (d) has been estimated to be~0.5-0.8 nm, matching well with the expected layer separation (~0.7 nm) 30,95,117 . Another consequence of the static electric dipole is the resulting dipole-dipole repulsive interactions between the interlayer excitons 22,28,30,118,119 , as revealed by a blue-shift in the PL energy with increasing exciton density (excitation power) (Fig. 3e) 22,28,30 .…”
Section: Static Electric Dipolementioning
confidence: 99%
“…We present the PL spectra for the other two samples with different twist angles, and the analysis of the multiple IX resonances with consistent dielectric environments in the SM [35,36]. Different possible interpretations for these resonances have been proposed, including phonon-mediated states, defect-bound states, and spin triplet states [37][38][39][40]. While we cannot rule out these alternative explanations definitively, we find that the interpretation of quantized exciton resonances confined within the moiré potential captures the essential features of our data as we further explain below [12,15,41].…”
mentioning
confidence: 99%