Enhanced half-metallicity at reconstructed zigzag edge of silicene
Department of Physics, University of Kashan - Kashan, 87317-51167, Iran
Received: 18 August 2016
Accepted: 31 January 2017
A theoretical study is presented on spin-dependent electronic properties in reconstructed zigzag edge of silicene nanoribbons in the presence of external electric and magnetic fields and the intrinsic spin-orbit interaction . The effect of various models of edge disorder, such as the extended Klein and 5-7 and 5-8 reconstructions, on electronic structure was investigated. We showed that in the presence of external electric and magnetic fields, all reconstructed edge states may be manipulated to produce a half-metallicity and a fully spin-polarized current at the Fermi energy. Moreover, we found a general condition to produce a half-metallicity in reconstructed silicene nanoribbons. The results show that in the case of the extended Klein reconstruction, the half-metallicity can be found when, i.e., and , but in the case of 5-7 and 5-8 edges, the half-metallicity is reached when and , respectively.
PACS: 71.70.Ej – Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect / 72.25.-b – Spin polarized transport / 68.60.-p – Physical properties of thin films, nonelectronic
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