Wedge energy bands of monolayer black phosphorus: a first-principles study.
On the basis of first-principles calculations, we present intriguing electronic properties of halogen-striped functionalized monolayer black phosphorus. The halogen-striped monolayer black phosphorus is found to have a wedge energy band with the energy-momentum relation of [Formula: see text] when the stripe-stripe distance is smaller than ~40 Å. Our tight-binding study shows that the wedge energy band occurs when 2-atom basis 1D lattices are periodically repeated aligned with each other in a 2D lattice. We also discuss the possible applications of this wedge energy band in electron supercollimation with high mobility or severely anisotropic electronic transport, which can be used for the development of optics-like nano-electronics.
Department of Physics, Konkuk University, Seoul 05029, Korea.
Minwoo
M
Park
Hyeonhu
H
Bae
Seunghan
S
Lee
Li
L
Yang
Hoonkyung
H
Lee