Franckeite as a naturally occurring van der Waals heterostructure
Molina-Mendoza, Aday J. (Universidad Autónoma de Madrid)
Giovanelli, Emerson (Instituto Madrileño de Estudios Avanzados en Nanociencia)
Paz, Wendel S. (Universidad Autónoma de Madrid)
Niño, Miguel Ángel (Instituto Madrileño de Estudios Avanzados en Nanociencia)
Island, Joshua O. (University of California)
Evangeli, Charalambos (Lancaster University)
Aballe, Lucía (ALBA Laboratori de Llum de Sincrotró)
Foerster, Michael (ALBA Laboratori de Llum de Sincrotró)
Van Der Zant, Herre S. J. (Delft University of Technology)
Rubio-Bollinger, Gabino (Universidad Autónoma de Madrid)
Agraït, Nicolás (Universidad Autónoma de Madrid)
Palacios, J. J. (Universidad Autónoma de Madrid)
Pérez, Emilio M. (Instituto Madrileño de Estudios Avanzados en Nanociencia)
Castellanos Gómez, Andrés (Instituto Madrileño de Estudios Avanzados en Nanociencia)

Date:	2017
Abstract:	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.
Grants:	Ministerio de Economía y Competitividad RYC-2014-01406 Ministerio de Ciencia e Innovación MAT2014-58399-JIN European Commission 604391 European Commission 307609 Ministerio de Economía y Competitividad CTQ2014-60541-P European Commission 291803 Ministerio de Ciencia e Innovación MAT2014-57915-R Ministerio de Ciencia e Innovación BES-2012-057346 Ministerio de Ciencia e Innovación FIS2011-23488 Ministerio de Ciencia e Innovación MAT2013-49893-EXP Ministerio de Ciencia e Innovación FIS2013-47328-C02-1 Ministerio de Ciencia e Innovación MAT2014-59315-R
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Published in:	Nature communications, Vol. 8 (February 2017) , art. 14409, ISSN 2041-1723

DOI: 10.1038/ncomms14409
PMID: 28194037

9 p, 2.3 MB

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Articles > Research articles
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