Atomic carbon chains as spin-transmitters: An ab initio transport study

被引：26

作者：

Furst, J. A. ^{[1
]}

Brandbyge, M. ^{[1
]}

Jauho, A. -P. ^{[1
,2
]}

机构：

[1] Tech Univ Denmark, NanoDTU, Dept Micro & Nanotechnol, DTU Nanotech, DK-2800 Lyngby, Denmark

[2] Aalto Univ, Dept Appl Phys, FI-00076 Aalto, Finland

来源：

EPL | 2010年 / 91卷 / 03期

关键词：

GRAPHENE; NANOTUBE; STATE;

D O I：

10.1209/0295-5075/91/37002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

An atomic carbon chain joining two graphene flakes was recently realized in a ground-breaking experiment by Jin et al. (Phys. Rev. Lett., 102 (2009) 205501). We present ab initio results for the electron transport properties of such chains and demonstrate complete spin-polarization of the transmission in large energy ranges. The effect is due to the spin-polarized zig-zag edge terminating each graphene flake causing a spin-splitting of the graphene pi(z) bands, and the chain states. Transmission occurs when the graphene p-states resonate with similar states in the strongly hybridized edges and chain. This effect should in general hold for any p-conjugated molecules bridging the zig-zag edges of graphene electrodes. The polarization of the transmission can be controlled by chemically or mechanically modifying the molecule, or by applying an electrical gate. Copyright (c) EPLA, 2010

引用

页数：5

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