Technical Talk Program

#Heterostructure #vacancy #defects #DFT #graphene #hexagonal #etc.
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The IEEE EDS Nepal Chapter organized a talk program on 26th August, 2022 in association with Central Department of Physics, Kirtipur. The talk was delivered by Dr. Hari Krishna Neupane. The title of the talk was “Effect of B, N & C sites vacancy defects in (G/h-BN) HS of 2D materials”. The program was started at 3:00PM and ended at 6:00 PM. The venue of the program was Seminar Hall, Central department of Physics, TU, Kirtipur. Total number of participant were 24. Among them 9 were IEEE members, 4 students and 11 were Physicist, Chemists and others. The program was so exiting that large number of questions were asked and Dr.  Neupane answered all questions very satisfactorily.


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  • Kirtipur, Kathmandu Nepal, Nepal
  • Nepal
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Hari

Topic:

Effect of B, N & C sites vacancy defects in (G/h-BN) HS of 2D materials

According to Dr. Neupane, heterostructures (HS) and vacancy defects in HS of 2D materials are fervently inspected for a profusion of applications because of their aptness to form stacked layers that confer approach to an amalgamation of favourable electronic and magnetic properties. In thiscontext, graphene (G), hexagonal boron nitride (h-BN) and HS of graphene/h-BN (G/h-BN)offer promising prospects for electronic, spintronic, and optoelectronic devices. In thisstudy, we investigated the structural, electronic, and magnetic properties of B, N & C sitesvacancy defects in G/h-BN HS material by using first-principles calculations based on spin-polarized density functional theory method within van der Waals (vdW) corrections DFT-D2 approach. We found that these considered materials are stable 2D vdW HS. Bandstructure calculations of these materials reveal that B & N sites vacancy defected G/h-BNmaterials have semi metallic nature. On the other hand, 1C & 2C vacancy defected G/h-BNmaterials have semiconducting and metallic properties respectively. On the basis of densityof states and projected density of states calculations, the defective systems are magneticmaterials. The magnetic moment obtained in these defective systems is due to the unpairedup-spin and down-spin states in the orbitals of C, B, and N atoms created by the vacancy

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