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Collective modes in anisotropic double layer systems
A. S. Rodin, A. H. Castro Neto
We study collective modes in anisotropic double layer systems. To this end, we derive a zero- dynamic polarization function for a conductor with a paraboloidal dispersion. Follo…
Exciton binding energies and luminescence of phosphorene under pressure
L. Seixas, A. S. Rodin, A. Carvalho +1
The optical response of phosphorene can be gradually changed by application of moderate uniaxial compression, as the material undergoes the transition into an indirect gap semicond…
Excitons in anisotropic 2D semiconducting crystals
A. S. Rodin, A. Carvalho, A. H. Castro Neto
The excitonic behavior of anisotropic two-dimensional crystals is investigated using numerical methods. We employ a screened potential arising due to the system polarizability to s…
Phosphorene nanoribbons
A. Carvalho, A. S. Rodin, A. H. Castro Neto
Edge-induced gap states in finite phosphorene layers are examined using analytical models and density functional theory. The nature of such gap states depends on the direction of t…
Tunable optical properties of multilayers black phosphorus thin films
Tony Low, A. S. Rodin, A. Carvalho +4
Black phosphorus thin films might offer attractive alternatives to narrow gap compound semiconductors for optoelectronics across mid- to near-infrared frequencies. In this work, we…
Strain-induced gap modification in black phosphorus
A. S. Rodin, A. Carvalho, A. H. Castro Neto
The band structure of single-layer black phosphorus and the effect of strain are predicted using density functional theory and tight-binding models. Having determined the localized…