Structural, electronic, magnetic and mechanical properties of vanadium-doped boron nitride monolayer

Shambhu Bhandari Sharma (), Ramchandra Bhatta, Keshav Raj Sigdel, Rajendra P. Adhikari and Gopi Chandra Kaphle
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Shambhu Bhandari Sharma: Tribhuvan University
Ramchandra Bhatta: Tribhuvan University
Keshav Raj Sigdel: Kathmandu University
Rajendra P. Adhikari: Kathmandu University
Gopi Chandra Kaphle: Tribhuvan University

The European Physical Journal B: Condensed Matter and Complex Systems, 2021, vol. 94, issue 6, 1-7

Abstract: Abstract We performed the DFT calculation to study the structural, electronic, magnetic, and mechanical properties of the vanadium-doped h-BN monolayer. Although the pristine h-BN is an intrinsically non-magnetic compound, magnetism is induced by doping a V atom on the boron site (B-site). Moreover, the doping of the V atom in the B-site changes the structure from the planer to a distorted buckled h-BN structure and alters the electronic and mechanical properties. The asymmetry in the spin-up and spin-down electronic states leaves a signature of magnetism in the doped system. DFT $$ + $$ + U calculations show that the V-doped system is a semiconductor for up spin states with a bandgap of 1.66 eV and a wide bandgap semiconductor for down spin states with a bandgap of 3.54 eV. A total magnetic moment of 2.0 $$ \mu _{B} $$ μ B is mainly observed due to the d orbital of the V atom. Further, mechanical properties analysis of the doped system shows that Young’s modulus decreases whereas the Poisson ratio increases in comparison to the pristine structure. It concludes the monolayer is softened by the doping due to the weakening of the covalent bond. Graphic abstract

Date: 2021
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DOI: 10.1140/epjb/s10051-021-00139-2

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