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政大機構典藏 > 理學院 > 應用物理研究所 > 期刊論文 > Item 140.119/70080

Please use this identifier to cite or link to this item: https://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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