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Bibliographische Detailangaben
Hauptverfasser: Zheng, Fawei, Zhou, Gang, Liu, Zhirong, Wu, Jian, Duan, Wenhui, Gu, Bing-Lin, Zhang, S. B.
Format: Preprint
Veröffentlicht: 2008
Schlagworte:
Online-Zugang:https://arxiv.org/abs/0804.4271
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Inhaltsangabe:
  • First-principles calculations reveal half metallicity in zigzag boron nitride (BN) nanoribbons (ZBNNRs). When the B edge, but not the N edge, of the ZBNNR is passivated, despite being a pure $sp$-electron system, the ribbon shows a giant spin splitting. The electrons at the Fermi level are 100% spin polarized with a half-metal gap of 0.38 eV and its conductivity is dominated by metallic single-spin states. The two states across at the Dirac point have different molecular origins, which signals a switch of carrier velocity. The ZBNNR should be a good potential candidate for widegap spintronics.