Laterally Extended States of Interlayer Excitons in Reconstructed MoSe$_2$/WSe$_2$ Heterostructures
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arXiv
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| Format: | Preprint |
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2024
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| author | Figueiredo, Johannes Richter, Marten Troue, Mirco Kiemle, Jonas Lambers, Hendrik Stiehm, Torsten Taniguchi, Takashi Watanabe, Kenji Wurstbauer, Ursula Knorr, Andreas Holleitner, Alexander W. |
| author_facet | Figueiredo, Johannes Richter, Marten Troue, Mirco Kiemle, Jonas Lambers, Hendrik Stiehm, Torsten Taniguchi, Takashi Watanabe, Kenji Wurstbauer, Ursula Knorr, Andreas Holleitner, Alexander W. |
| contents | Heterostructures made from 2D transition-metal dichalcogenides are known as ideal platforms to explore excitonic phenomena ranging from correlated moiré excitons to degenerate interlayer exciton ensembles. So far, it is assumed that the atomic reconstruction appearing in some of the heterostructures gives rise to a dominating localization of the exciton states. We demonstrate that excitonic states in reconstructed MoSe$_2$/WSe$_2$ heterostructures can extend well beyond the moiré periodicity of the investigated heterostructures. The results are based on real-space calculations yielding a lateral potential map for interlayer excitons within the strain-relaxed heterostructures and corresponding real-space excitonic wavefunctions. We combine the theoretical results with cryogenic photoluminescence experiments, which support the computed level structure and relaxation characteristics of the interlayer excitons. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_19616 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Laterally Extended States of Interlayer Excitons in Reconstructed MoSe$_2$/WSe$_2$ Heterostructures Figueiredo, Johannes Richter, Marten Troue, Mirco Kiemle, Jonas Lambers, Hendrik Stiehm, Torsten Taniguchi, Takashi Watanabe, Kenji Wurstbauer, Ursula Knorr, Andreas Holleitner, Alexander W. Mesoscale and Nanoscale Physics Heterostructures made from 2D transition-metal dichalcogenides are known as ideal platforms to explore excitonic phenomena ranging from correlated moiré excitons to degenerate interlayer exciton ensembles. So far, it is assumed that the atomic reconstruction appearing in some of the heterostructures gives rise to a dominating localization of the exciton states. We demonstrate that excitonic states in reconstructed MoSe$_2$/WSe$_2$ heterostructures can extend well beyond the moiré periodicity of the investigated heterostructures. The results are based on real-space calculations yielding a lateral potential map for interlayer excitons within the strain-relaxed heterostructures and corresponding real-space excitonic wavefunctions. We combine the theoretical results with cryogenic photoluminescence experiments, which support the computed level structure and relaxation characteristics of the interlayer excitons. |
| title | Laterally Extended States of Interlayer Excitons in Reconstructed MoSe$_2$/WSe$_2$ Heterostructures |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2411.19616 |