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Band nesting and the optical response of two-dimensional semiconducting transition metal dichalcogenides

Carvalho, A. ; Ribeiro, R. M. ; Castro Neto, A. H.

Physical review. B, Condensed matter and materials physics, 2013-09, Vol.88 (11), Article 115205 [Periódico revisado por pares]

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Título:
Band nesting and the optical response of two-dimensional semiconducting transition metal dichalcogenides
Autor: Carvalho, A. ; Ribeiro, R. M. ; Castro Neto, A. H.
Assuntos: Band structure of solids ; Banded structure ; Condensed matter ; Crystals ; Density functional theory ; Nesting ; Transition metals ; Two dimensional
É parte de: Physical review. B, Condensed matter and materials physics, 2013-09, Vol.88 (11), Article 115205
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
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Descrição: We have studied the optical conductivity of two-dimensional (2D) semiconducting transition metal dichalcogenides using ab initio density functional theory. We find that this class of materials presents large optical response due to the phenomenon of band nesting. The tendency towards band nesting is enhanced by the presence of van Hove singularities in the band structure of these materials. Given that 2D crystals are atomically thin and naturally transparent, our results show that it is possible to have strong photon-electron interactions even in 2D.
Idioma: Inglês

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