Description: Elastic properties of moiré lattices in epitaxial two-dimensional materials

This title appears in the Scientific Report : 2022

Elastic properties of moiré lattices in epitaxial two-dimensional materials

Unlike conventional two-dimensional (2D) semiconductor superlattices, moiré patterns in 2D materials are flexible and their electronic, magnetic, optical, and mechanical properties depend on their topography. Within a continuous+atomistic theory treating 2D materials as crystalline elastic membranes...

Personal Name(s):	Artaud, Alexandre
	Rougemaille, Nicolas / Vlaic, Sergio / Renard, Vincent T. / Atodiresei, Nicolae / Coraux, Johann (Corresponding author)
Contributing Institute:	Quanten-Theorie der Materialien; IAS-1 JARA - HPC; JARA-HPC JARA-FIT; JARA-FIT Quanten-Theorie der Materialien; PGI-1
Published in:	Physical review / B, 106 (2022) 20, S. L201402
Imprint:	Woodbury, NY Inst. 2022
DOI:	10.1103/PhysRevB.106.L201402
Document Type:	Journal Article
Research Program:	Topological Matter
Link:	OpenAccess
	Publikationsportal JuSER

Please use the identifier: http://hdl.handle.net/2128/32429 in citations.
Please use the identifier: http://dx.doi.org/10.1103/PhysRevB.106.L201402 in citations.

Unlike conventional two-dimensional (2D) semiconductor superlattices, moiré patterns in 2D materials are flexible and their electronic, magnetic, optical, and mechanical properties depend on their topography. Within a continuous+atomistic theory treating 2D materials as crystalline elastic membranes, we abandon the flat-membrane scenario usually assumed for these materials and address out-of-plane deformations. We confront our predictions to experimental analyses on model systems, epitaxial graphene, and MoS2 on metals and reveal that compression/expansion and bending energies stored in the membrane can compete with adhesion energy, leading to a subtle moiré wavelength selection and the formation of wrinkles.