• 文献标题:   Diamagnetism in zigzag hexagonal graphene rings
  • 文献类型:   Article
  • 作  者:   XU N, CHEN Q, TIAN HY, WANG BL, DING JW
  • 作者关键词:   magnetic moment, tightbinding formalism
  • 出版物名称:   PHYSICS LETTERS A
  • ISSN:   0375-9601 EI 1873-2429
  • 通讯作者地址:   Yancheng Inst Technol
  • 被引频次:   3
  • DOI:   10.1016/j.physleta.2016.01.023
  • 出版年:   2016

▎ 摘  要

The electronic structure and magnetic response of hexagonal graphene rings have been studied within the tight-binding formalism. The calculations show that hexagonal graphene rings possess unusually large diamagnetic moments in the presence of a perpendicular magnetic field. The magnetic-field-driven carriers flow clockwise and anticlockwise along the inner and outer edge of rings owing to quantum Hall effect. The value of magnetic moment is almost proportional to the number of atoms of rings, due to more conduction electrons participating in magnetic moment forming process. Additionally, we find the diamagnetic moment shows a relative weak dependence on the temperature. (C) 2016 Elsevier B.V. All rights reserved.