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Confinement of long-lived interlayer excitons in WS2/WSe2 heterostructures

Accepted version
Peer-reviewed

Type

Article

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Authors

Abstract

jats:titleAbstract</jats:title>jats:pInterlayer excitons in layered materials constitute a novel platform to study many-body phenomena arising from long-range interactions between quantum particles. Long-lived excitons are required to achieve high particle densities, to mediate thermalisation, and to allow for spatially and temporally correlated phases. Additionally, the ability to confine them in periodic arrays is key to building a solid-state analogue to atoms in optical lattices. Here, we demonstrate interlayer excitons with lifetime approaching 0.2 ms in a layered-material heterostructure made from WSjats:sub2</jats:sub> and WSejats:sub2</jats:sub> monolayers. We show that interlayer excitons can be localised in an array using a nano-patterned substrate. These confined excitons exhibit microsecond-lifetime, enhanced emission rate, and optical selection rules inherited from the host material. The combination of a permanent dipole, deterministic spatial confinement and long lifetime places interlayer excitons in a regime that satisfies one of the requirements for simulating quantum Ising models in optically resolvable lattices.</jats:p>

Description

Keywords

cond-mat.mes-hall, cond-mat.mes-hall, cond-mat.mtrl-sci, quant-ph

Journal Title

Communications Physics

Conference Name

Journal ISSN

2399-3650
2399-3650

Volume Title

4

Publisher

Springer Science and Business Media LLC

Rights

All rights reserved
Sponsorship
Engineering and Physical Sciences Research Council (EP/K01711X/1)
European Commission (284558)
European Commission (604391)
Engineering and Physical Sciences Research Council (EP/L016087/1)
European Commission Horizon 2020 (H2020) Future and Emerging Technologies (FET) (696656)
EPSRC (via University of Manchester) (R119256)
Royal Society of Chemistry (unknown)
European Commission Horizon 2020 (H2020) Future and Emerging Technologies (FET) (785219)
Engineering and Physical Sciences Research Council (EP/G042357/1)
The Royal Society (wm090070)
European Research Council (319277)
Royal Society (URF\R1\180593)
Royal Society (RGF\EA\181089)
Engineering and Physical Sciences Research Council (EP/K017144/1)
European Commission Horizon 2020 (H2020) Future and Emerging Technologies (FET) (881603)
European Commission Horizon 2020 (H2020) ERC (862405)
European Commission Horizon 2020 (H2020) Future and Emerging Technologies (FET) (820378)
Engineering and Physical Sciences Research Council (2275031)