Strain Engineering of Magneto-optical Properties in C$_3$B/C$_3$N van der Waals Heterostructure

TL;DR

This paper theoretically explores how mechanical strain and magnetic fields influence the electronic and optical properties of C3B/C3N van der Waals heterostructures, revealing tunable features for future device applications.

Contribution

It introduces a comprehensive theoretical model including strain and magnetic effects on C3B/C3N heterostructures, highlighting their potential for electronic and optoelectronic engineering.

Findings

Strain induces band inversion and modifies band gaps.

Magnetic field affects electronic quantization and optical spectra.

Optical absorption is significantly enhanced under strain.

Abstract

Carbon-based bilayer van der Waals (vdW) materials are attracting much attention due to their predicted interesting physical properties. Here, we theoretically investigate electronic and optical properties of C$_3$B/C$_3$N vdW heterostructure (HTS) under external magnetic field and mechanical strain. The tight-binding model of the system is constructed to include the strain-induced modification of the hopping interactions. The influence of a uniform perpendicular magnetic field is included by using the Peierls substitution method. We observe the intriguing electronic and optical characteristics of the HTS under mechanical strain, covering the band inversion, alteration of band gap and optical gap, distortion of band-edge states, as well as significant enhancement of optical absorption. Furthermore, the interplay between external magnetic field and biaxial strain leads to exotic features of quantization and optical spectra. This work provides important information for the comprehension of the engineering of materials by external effects. Our study suggests that C$_3$B/C$_3$N vdW HTS is a promising candidate for next-generation electronic and optoelectronic devices.