• 文献标题:   Spintronic properties of 2D heterostructures from laterally connected graphene and hBN quantum dots
  • 文献类型:   Article
  • 作  者:   ABDELSALAM H, ZHANG QF
  • 作者关键词:   2d heterostructure, laterally connected quantum dot, dft, spintronic propertie, uvvis spectrum, electric field
  • 出版物名称:   CHEMICAL PHYSICS LETTERS
  • ISSN:   0009-2614 EI 1873-4448
  • 通讯作者地址:  
  • 被引频次:   0
  • DOI:   10.1016/j.cplett.2023.140591 EA MAY 2023
  • 出版年:   2023

▎ 摘  要

2D heterostructures based on graphene/hBN nanodots are investigated using DFT calculations. They have ferromagnetic spin ordering with spin directly proportional to the number and size of the graphene nanodots. The wide energy gap of hBN acts as confinement potential for graphene electronic states, thus the resultant system is type-I heterojunction. An applied electric field converts the type-I to type-II heterojunction. The prominent excitation of the UV-Vis spectrum, at-4 eV, is equally contributed by transitions between spin-up and spin-down orbitals. The spectrum is redshifted to a lower energy by the electric field with excitations contributed mostly by spin-down transitions.