# Observation of ultrafast interfacial Meitner-Auger energy transfer in a Van der Waals heterostructure https://mdr.nims.go.jp/datasets/aa041d00-20b0-4dbc-9f20-a71248149d55 ## File - [s41467-023-40815-8.pdf](https://mdr.nims.go.jp/filesets/374c63ed-d6ec-4a7e-a580-31843fc9e3eb/download) ([Detail](https://mdr.nims.go.jp/filesets/374c63ed-d6ec-4a7e-a580-31843fc9e3eb.md)) ## Id aa041d00-20b0-4dbc-9f20-a71248149d55 ## Local identifier ## Visibility open_to_public ## State published ## Created at 2025-02-14T08:12:00.482563Z ## Updated at 2025-02-15T03:31:27.202084Z ## Published at 2025-02-15T03:31:27.299733Z ## Doi ## First published url https://doi.org/10.1038/s41467-023-40815-8 ## Date published 2023-08-19 ## Recorded date published ## Resource type journal_article ## Manuscript type vor ## Collection ## Title - title: Observation of ultrafast interfacial Meitner-Auger energy transfer in a Van der Waals heterostructure title_type: original lang: en ## Description - description: 'Atomically thin layered van der Waals heterostructures feature exotic and emergent optoelectronic properties. With growing interest in these novel quantum materials, the microscopic understanding of fundamental interfacial coupling mechanisms is of capital importance. Here, using multidimensional photoemission spectroscopy, we provide a layer- and momentum-resolved view on ultrafast interlayer electron and energy transfer in a monolayer- WSe2/graphene heterostructure. Depending on the nature of the optically prepared state, we find the different dominating transfer mechanisms: while electron injection from graphene to WSe2 is observed after photoexcitation of quasi-free hot carriers in the graphene layer, we establish an interfacial Meitner-Auger energy transfer process following the excitation of excitons in WSe2. By analysing the time-energy-momentum distributions of excited-state carriers with a rate-equation model, we distinguish these two types of interfacial dynamics and identify the ultrafast conversion of excitons in WSe2 to valence band transitions in graphene. Microscopic calculations find interfacial dipole-monopole coupling underlying the Meitner- Auger energy transfer to dominate over conventional Förster- and Dexter-type interactions, in agreement with the experimental observations. The energy transfer mechanism revealed here might enable new hot-carrier-based device concepts with van der Waals heterostructures.' description_type: abstract lang: und ## Creator - name: Shuo Dong role: author - name: Samuel Beaulieu role: author - name: Malte Selig role: author - name: Philipp Rosenzweig role: author - name: Dominik Christiansen role: author - name: Tommaso Pincelli role: author - name: Maciej Dendzik role: author - name: Jonas D. Ziegler role: author - name: Julian Maklar role: author - name: R. Patrick Xian role: author - name: Alexander Neef role: author - name: Avaise Mohammed role: author - name: Armin Schulz role: author - name: Mona Stadler role: author - name: Michael Jetter role: author - name: Peter Michler role: author - name: Takashi Taniguchi role: author orcid: https://orcid.org/0000-0002-1467-3105 organization: National Institute for Materials Science ror: https://ror.org/026v1ze26 - name: Kenji Watanabe role: author orcid: https://orcid.org/0000-0003-3701-8119 organization: National Institute for Materials Science ror: https://ror.org/026v1ze26 - name: Hidenori Takagi role: author - name: Ulrich Starke role: author - name: Alexey Chernikov role: author - name: Martin Wolf role: author - name: Hiro Nakamura role: author - name: Andreas Knorr role: author - name: Laurenz Rettig role: author - name: Ralph Ernstorfer role: author ## Contact agent ## Publisher organization: Springer Science and Business Media LLC ## Managing organization ## Keyword - subject: Van der Waals heterostructures schema: not_defined - subject: photoemission spectroscopy schema: not_defined - subject: interlayer electron transfer schema: not_defined ## Rights - identifier: https://creativecommons.org/licenses/by/4.0/ ## Other identifier(s) ## Data origin ## Embargo ## Journal - title: Nature Communications issn: '20411723' volume: '14' issue: '1' article_number: '5057' ## Conference ## Related item ## Funding ## Instrument ## Instrument operator ## Instrument managing organization ## Measurement method ## Specimen ## Chemical composition ## Structure for specimen ## Structural feature for specimen ## Specific property for specimen ## Process for specimen treatment ## Computational method ## Energy level/transition state ## Software ## Custom property ## Fileset - id: 374c63ed-d6ec-4a7e-a580-31843fc9e3eb filename: s41467-023-40815-8.pdf content_type: application/pdf size: 2190561 md5: 36d10bd5d24f9225f9828851ddb55447 ## Thumbnail fileset_id: 374c63ed-d6ec-4a7e-a580-31843fc9e3eb filename: s41467-023-40815-8.pdf