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Phosphorene analogues: Isoelectronic two-dimensional group-IV monochalcogenides with orthorhombic structure

Gomes, Lídia C. ; Carvalho, A.

Physical review. B, Condensed matter and materials physics, 2015-08, Vol.92 (8), Article 085406 [Periódico revisado por pares]

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Título:
Phosphorene analogues: Isoelectronic two-dimensional group-IV monochalcogenides with orthorhombic structure
Autor: Gomes, Lídia C. ; Carvalho, A.
Assuntos: Condensed matter ; Conduction band ; Electronics ; Infrared ; Mathematical analysis ; Optical properties ; Semiconductors ; Splitting
É parte de: Physical review. B, Condensed matter and materials physics, 2015-08, Vol.92 (8), Article 085406
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
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Descrição: The group-IV monochalcogenides SnS, SnSe, GeS, and GeSe form a family within the wider group of semiconductor "phosphorene analogues." Here, we used first-principles calculations to investigate systematically their structural, electronic, and optical properties, analyzing the changes associated with the reduction of dimensionality, from bulk to monolayer or bilayer form. We show that all those binary phosphorene analogues are semiconducting, with band-gap energies covering part of the infrared and visible range, and in most cases higher than phosphorene. Further, we found that they have multiple valleys in the valence and conduction band, the latter with spin-orbit splitting of the order of 19-86 meV.
Idioma: Inglês

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