Optical transitions and localized edge states in skewed zigzag phosphorene nanoribbons
Artikel i vetenskaplig tidskrift, 2018

Using the Tight Binding (TB) parameters extracted from Density Functional Theory (DFT) and Recursive Green's Function method (RGF), it is shown that skewed-zigzag black phosphorus (phosphorene) nanoribbons obtain large and tuneable bandgap in response to vertical and transverse electric fields. Depending on the direction of the applied field the mid-gap states could possess the localized or metallic nature i.e., non-zero midgap density of states. Adjustability of the bandgap and optical dipole transition matrix elements are explained based on the symmetry of involved band edge states. This promises new electronic and optical devices based on phosphorene nanoribbons.

PHOTO DETECTOR

PHOSPHORENE NANORIBBON

Nonequilibrium Green Function Methdo (NEGF), tight binding

2D MATERIALS

Författare

Sima Shekarforoush

University of Zanjan

Farhad Khoeini

University of Zanjan

Daryoush Shiri

Chalmers, Fysik, Kondenserade materiens teori

Materials Express

2158-5849 (ISSN) 2158-5857 (eISSN)

Vol. 8 6 489-499

Ämneskategorier

Annan fysik

Teoretisk kemi

Den kondenserade materiens fysik

DOI

10.1166/mex.2018.1458

Mer information

Senast uppdaterat

2019-01-18