TY - JOUR
T1 - Franckeite as a naturally occurring van der Waals heterostructure
AU - Molina-Mendoza, Aday J.
AU - Giovanelli, Emerson
AU - Paz, Wendel S.
AU - Ninõ, Miguel Angel
AU - Island, Joshua O.
AU - Evangeli, Charalambos
AU - Aballe, Luciá
AU - Foerster, Michael
AU - Van Der Zant, Herre S.J.
AU - Rubio-Bollinger, Gabino
AU - Agraït, Nicolás
AU - Palacios, JJ
AU - Pérez, Emilio M.
AU - Castellanos-Gomez, Andres
PY - 2017/2/13
Y1 - 2017/2/13
N2 - The fabrication of van der Waals heterostructures, artificial materials assembled by individual stacking of 2D layers, is among the most promising directions in 2D materials research. Until now, the most widespread approach to stack 2D layers relies on deterministic placement methods, which are cumbersome and tend to suffer from poor control over the lattice orientations and the presence of unwanted interlayer adsorbates. Here, we present a different approach to fabricate ultrathin heterostructures by exfoliation of bulk franckeite which is a naturally occurring and air stable van der Waals heterostructure (composed of alternating SnS 2-like and PbS-like layers stacked on top of each other). Presenting both an attractive narrow bandgap (<0.7 eV) and p-type doping, we find that the material can be exfoliated both mechanically and chemically down to few-layer thicknesses. We present extensive theoretical and experimental characterizations of the material's electronic properties and crystal structure, and explore applications for near-infrared photodetectors.
AB - The fabrication of van der Waals heterostructures, artificial materials assembled by individual stacking of 2D layers, is among the most promising directions in 2D materials research. Until now, the most widespread approach to stack 2D layers relies on deterministic placement methods, which are cumbersome and tend to suffer from poor control over the lattice orientations and the presence of unwanted interlayer adsorbates. Here, we present a different approach to fabricate ultrathin heterostructures by exfoliation of bulk franckeite which is a naturally occurring and air stable van der Waals heterostructure (composed of alternating SnS 2-like and PbS-like layers stacked on top of each other). Presenting both an attractive narrow bandgap (<0.7 eV) and p-type doping, we find that the material can be exfoliated both mechanically and chemically down to few-layer thicknesses. We present extensive theoretical and experimental characterizations of the material's electronic properties and crystal structure, and explore applications for near-infrared photodetectors.
UR - http://resolver.tudelft.nl/uuid:a133d32b-8191-4137-9ac2-1a7fc91240d2
UR - http://www.scopus.com/inward/record.url?scp=85012273937&partnerID=8YFLogxK
U2 - 10.1038/ncomms14409
DO - 10.1038/ncomms14409
M3 - Article
AN - SCOPUS:85012273937
SN - 2041-1723
VL - 8
JO - Nature Communications
JF - Nature Communications
M1 - 14409
ER -