Excitons and optical spectra of phosphorene nanoribbons

Abstract

On the basis of many-body {\it ab-initio} calculations, using single-shot G${}_0$W${}_0$ method and Bethe-Salpeter equation, we study phosphorene nanoribbons (PNRs) in the two typical zigzag and armchair directions. The electronic structure, optical absorption, electron-hole (exciton) binding energy, exciton exchange splitting, and exciton wave functions are calculated for different size of PNRs. The typically strong splitting between singlet and triplet excitonic states make PNRs favorable systems for application in optoelectronic. Quantum confinement occurs in both kinds of PNRs, and it is stronger in the zPNRs, as behave like quasi-zero-dimensional systems. Scaling laws are investigated for the size-dependent behaviors of PNRs. The first bright excitonic state in PNRs is explored in detail.

9 pages, 11 figures

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Cited by in corpus (8)

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• Dimensionality and Anisotropicity Dependence of Radiative Recombination in Nanostructured Phosphorene
• Charge transport in doped zigzag phosphorene nanoribbons
• Phosphorene as a nanoelectromechanical material
• Room Temperature Optically and Magnetically Active Edges in Phosphorene Nanoribbons
• Influence of Edge Functionalization on Electronic and Optical Properties of Armchair Phosphorene Nanoribbons: a First-Principles Study
• Natural hyperbolicity in the layered hexagonal crystal structure
• Nonlocal and nonlinear plasmonics in atomically thin heterostructures