{ "id": "1805.10010", "version": "v1", "published": "2018-05-25T07:13:55.000Z", "updated": "2018-05-25T07:13:55.000Z", "title": "Intervalley Scattering of Interlayer Excitons in a MoS$_2$/MoSe$_2$/MoS$_2$ Heterostructure in High Magnetic Field", "authors": [ "Alessandro Surrente", "Lukasz Klopotowski", "Nan Zhang", "Michal Baranowski", "Anatolie A. Mitioglu", "Mariana V. Ballottin", "Peter C. M. Christianen", "Dumitru Dumcenco", "Yen-Cheng Kung", "Duncan K. Maude", "Andras Kis", "Paulina Plochocka" ], "comment": "just accepted in Nano Letters, DOI: 10.1021/acs.nanolett.8b01484", "doi": "10.1021/acs.nanolett.8b01484", "categories": [ "cond-mat.mes-hall" ], "abstract": "Degenerate extrema in the energy dispersion of charge carriers in solids, also referred to as valleys, can be regarded as a binary quantum degree of freedom, which can potentially be used to implement valleytronic concepts in van der Waals heterostructures based on transition metal dichalcogenides. Using magneto-photoluminescence spectroscopy, we achieve a deeper insight into the valley polarization and depolarization mechanisms of interlayer excitons formed across a MoS$_2$/MoSe$_2$/MoS$_2$ heterostructure. We account for the non-trivial behavior of the valley polarization as a function of the magnetic field by considering the interplay between exchange interaction and phonon mediated intervalley scattering in a system consisting of Zeeman-split energy levels. Our results represent a crucial step towards the understanding of the properties of interlayer excitons, with strong implications for the implementation of atomically thin valleytronic devices.", "revisions": [ { "version": "v1", "updated": "2018-05-25T07:13:55.000Z" } ], "analyses": { "keywords": [ "interlayer excitons", "high magnetic field", "intervalley scattering", "van der waals heterostructures", "valley polarization" ], "tags": [ "journal article" ], "publication": { "publisher": "ACS" }, "note": { "typesetting": "TeX", "pages": 0, "language": "en", "license": "arXiv", "status": "editable" } } }