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    Please use this identifier to cite or link to this item: http://nccur.lib.nccu.edu.tw/handle/140.119/70080


    Title: Topological states of Sb thin films contacted by a single sheet of heterogeneous atoms
    Authors: 楊志開
    Lee,Chi-Hsuan;Yang, Chih-Kai
    Contributors: 應物所
    Keywords: topological insulator;Sb thin film;Dirac cone;spin texture
    Date: 2014.09
    Issue Date: 2014-09-23 10:27:34 (UTC+8)
    Abstract: We found that thin antimony films contacted by a single layer of a variety of atoms can form topological surface and interface states in the gap of bulk energy bands that preserve time-reversal symmetry. Using density functional calculation, we have included bismuth, graphene, boron-nitride and boron-doped graphene layers in our investigation. In most cases, Dirac cones are found in the band structures and spin textures indicate no back scattering of conduction electrons. In the case of a BC3 layer deposited on an Sb film as thin as three bilayers, a Dirac cone consisting mostly of interface states is formed close to the Fermi level. If the composite is gated by an adjustable voltage, electron transport can switch between two modes of opposite spins, and between one or two modes of 100% spin polarization. The results should be very useful in the applications of topological conduction and spintronics.
    Relation: New Journal of Physics,16(9),093006-1-093006-14
    Data Type: article
    DOI 連結: http://dx.doi.org/10.1088/1367-2630/16/9/093006
    DOI: 10.1088/1367-2630/16/9/093006
    Appears in Collections:[應用物理研究所 ] 期刊論文

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