Excitonic transport driven by repulsive dipolar interaction in a van der Waals heterostructure.
Journal
Nature photonics
ISSN: 1749-4885
Titre abrégé: Nat Photonics
Pays: England
ID NLM: 101283276
Informations de publication
Date de publication:
Jan 2022
Jan 2022
Historique:
entrez:
7
1
2022
pubmed:
8
1
2022
medline:
8
1
2022
Statut:
ppublish
Résumé
Dipolar bosonic gases are currently the focus of intensive research due to their interesting many-body physics in the quantum regime. Their experimental embodiments range from Rydberg atoms to GaAs double quantum wells and van der Waals heterostructures built from transition metal dichalcogenides. Although quantum gases are very dilute, mutual interactions between particles could lead to exotic many-body phenomena such as Bose-Einstein condensation and high-temperature superfluidity. Here, we report the effect of repulsive dipolar interactions on the dynamics of interlayer excitons in the dilute regime. By using spatial and time-resolved photoluminescence imaging, we observe the dynamics of exciton transport, enabling a direct estimation of the exciton mobility. The presence of interactions significantly modifies the diffusive transport of excitons, effectively acting as a source of drift force and enhancing the diffusion coefficient by one order of magnitude. The repulsive dipolar interactions combined with the electrical control of interlayer excitons opens up appealing new perspectives for excitonic devices.
Identifiants
pubmed: 34992677
doi: 10.1038/s41566-021-00908-6
pmc: PMC7612161
mid: EMS136890
doi:
Types de publication
Journal Article
Langues
eng
Pagination
79-85Subventions
Organisme : European Research Council
ID : 682332
Pays : International
Déclaration de conflit d'intérêts
Competing Interests The authors declare no competing interests.
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