Electric, Optoelectronic, and Thermoelectric Properties of Moiré Superlattices of Bilayer Borophene with Different Twist Angles

Abstract

In this study, the electrical, optoelectronic, and thermoelectric properties of bilayer borophene moiré superlattices at different twist angles are investigated in detail. The results reveal that the transport properties of bilayer borophene are significantly impacted by different twist angles. Specifically, the device with 30° is of better transport properties compared to the two devices, due to the absence of interlayer covalent bond. The study reveals the essential influence of twist angle on the moiré superlattice of bilayer borophene and provides a theoretical basis for its potential applications in electronic, optoelectronic, and thermoelectric devices.

Bilayer Borophene Allotropes: Structural Stabilities and Electronic Properties

“…For the former, an interlayer covalent chemical bond results in the form of two Dirac points in BLB, and for the latter, the strong hybrid coupling interaction and interfacial charge transfer between BLB and Ag(111) substrate results in the interlayer covalent bond by the van der Waals interaction. Theoretically, the various BLBs with the same or different phases as those in experiments were investigated. − Compared with most borophene monolayers, BLBs show greater stability and antioxidant activity due to their larger work function and stronger charge transfer, which is beneficial to the fabrication of devices. Moreover, BLB is found to display double-Dirac cones, antiferromagnetism, and the nodal line Fermions .…”