• 文献标题:   Spin-Polarized Transport Behavior Induced by Asymmetric Edge Hydrogenation in Hybridized Zigzag Boron Nitride and Graphene Nanoribbons
  • 文献类型:   Article
  • 作  者:   WANG LH, DING BJ, GUO Y
  • 作者关键词:   hybridization nanoribbon, negative differential resistance, spinfiltering, oscillation
  • 出版物名称:   JOURNAL OF ELECTRONIC MATERIALS
  • ISSN:   0361-5235 EI 1543-186X
  • 通讯作者地址:   Shanxi Datong Univ
  • 被引频次:   1
  • DOI:   10.1007/s11664-018-6711-x
  • 出版年:   2019

▎ 摘  要

We fused zigzag graphene to boron nitride nanoribbons by gradually doping C atoms at only one edge of the ribbons to design a hybridized ZB(x)N(y)C(z) (x+y+z=12) structure. To create asymmetric edge hydrogenation, the ZB(x)N(y)C(z) ribbons were monohydrogenated (N-H) at one edge and dihydrogenated (C-H-2) at the opposite edge, and the structure was subsequently labeled as H-ZB(x)N(y)C(z)-H-2. On the basis of density functional theory and non-equilibrium Green's function, our simulation revealed that H-ZB(x)N(y)C(z)-H-2-based devices present a variety of abnormal spin-polarized transport properties. When the value of x and y in the H-ZB(x)N(y)C(z)-H-2 structure is not equal (i.e., z is an odd number), the spin-polarized currents are restricted, regardless of their ferromagnetic (FM) or anti-ferromagnetic (AFM) state. When x is equal to y (i.e., z is an even number), the H-ZB(x)N(y)C(z)-H-2 structure exhibits negative differential resistance and spin-filtering features in the FM state. Conversely, in the AFM state, the spin-polarized currents of the structure exhibit an exceptional oscillation effect with spin polarization as high as 100% at certain bias voltages. By adjusting the width of graphene and the spin states, the resulting hybridized H-ZB(x)N(y)C(z)-H-2 structure can be potentially applied to the fabrication of spin nanodevices with exotic functionalities.