Van der Waals heterostructures have been so far mostly assembled by artificial stacking of individual 2D layers with diverse functionalities. Here, the authors shift the focus demonstrating the exfoliation of a naturally occurring franckeite heterostructure, a p-type narrow band-gap semiconductor.
- Aday J. Molina-Mendoza
- Emerson Giovanelli
- Andres Castellanos-Gomez
