Direct Nanoscale Mapping of Band Alignment in Single-Layer Semiconducting Lateral Heterojunctions
LHSs. By combining nanoARPES with spatially resolved photoluminescence, we correlate the evolution of the valence band maximum and exciton features across both atomically sharp and compositionally graded diffusive interfaces. We identified type-II band alignments governed by both material composition and interstitial-induced modifications of band offsets in close agreement with density functional theory calculations. These results reveal fundamental mechanisms of electronic structure modulation at 1D TMDC heterointerfaces and provide a robust platform for tailored band engineering in van der Waals materials.
Authors
- Søren Ulstrup (ORCID: https://orcid.org/0000-0001-5922-4488)
- Manas Sharma (ORCID: https://orcid.org/0000-0002-5346-6280)
- Chakradhar Sahoo (ORCID: https://orcid.org/0000-0002-2043-1807)
- Céphise Cacho (ORCID: https://orcid.org/0000-0002-0058-5817)
- Subhadip Das (ORCID: https://orcid.org/0000-0001-9030-9471)
- Ananth Govind Rajan (ORCID: https://orcid.org/0000-0003-2462-0506)
- Tony F. Heinz (ORCID: https://orcid.org/0000-0003-1365-9464)
- Alfred J. H. Jones (ORCID: https://orcid.org/0000-0002-7930-0967)
- Prasana Kumar Sahoo
- Zhihao Jiang (ORCID: https://orcid.org/0000-0002-4203-1062)
- Thomas S. Nielsen
- M. D. Watson (ORCID: https://orcid.org/0000-0002-0737-2814)
- Ihsan Ahmed Kolasseri
- Suman Kumar Chakraborty
- Kenji Watanabe (ORCID: https://orcid.org/0000-0003-3701-8119)
- A. Kousika
- Yong P. Chen
- Takashi Taniguchi (ORCID: https://orcid.org/0000-0002-1467-3105)
Institutions
- Aarhus University (DK)
- National Institute for Materials Science (JP)
- SLAC National Accelerator Laboratory (US)
- Diamond Light Source (GB)
- Indian Institute of Science Bangalore (IN)
- Stanford University (US)
Publication Details
- Journal
- Nano Letters
- Published
- 2026-04-13
- DOI
- https://doi.org/10.1021/acs.nanolett.6c00590
- Primary Topic
- Topological Materials and Phenomena
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Villum Fonden
- Department of Science and Technology, Ministry of Science and Technology, India
- Ministry of Education, Culture, Sports, Science and Technology
- Novo Nordisk Fonden
- Japan Society for the Promotion of Science
- Science and Engineering Research Board
- H2020 European Research Council
- HORIZON EUROPE Marie Sklodowska-Curie Actions