Multiple Linear Dichroism Inversions in SnO Monolayers for Polarization-Sensitive UV Photodetection: An Ab Initio Investigation.

ABSTRACT: Tin monoxide (SnO) undergoes a phase transition from litharge-like tetragonal (space group P4/nmm) to orthorhombic geometry (layer group pmmn) in passing from multilayer to monolayer crystals. By means of ab initio ground and excited-state methods, we explore the impact of the reduced pmmn spatial symmetry on the electronic and optical properties of SnO monolayers. As a consequence of the in-plane anisotropy, the electronic states of the band edges show asymmetric projections onto the p _x and p _y atomic orbitals along orthogonal directions in the Brillouin zone. This results in optical absorption and exciton properties that are highly sensitive to the direction of in-plane polarized light. In contrast to typical linear dichroi

SUBMITTER: Re Fiorentin M 

PROVIDER: S-EPMC11812053 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature