Resonant spin-filtering in cobalt decorated nanotubes

被引：9
|
作者：
Blase, X. [1 ]
Margine, E. R. [2 ]
机构：
[1] Univ Grenoble 1, Inst Neel, CNRS, F-38042 Grenoble 9, France
[2] Univ Oxford, Dept Mat, Oxford OX1 3PH, England
来源：
APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 17期
关键词：
ab initio calculations; carbon nanotubes; cobalt; diffusion; electrical conductivity; Fermi level; metal clusters; spin polarised transport; WALLED CARBON NANOTUBES; SPINTRONICS; CONDUCTANCE; TRANSPORT; STATES;
D O I：
10.1063/1.3120553
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We study by means of first-principles calculations within the Landauer formalism the transport properties of carbon nanotubes filled with cobalt clusters. We show that in the limit of small cluster sizes, a significant spin polarization of the incoming pi-pi(*) wave packets can be obtained on a large energy range around the Fermi level. However, in the limit of increasing cluster size, both the spin polarization and total conductance decrease dramatically, suggesting that strategies to limit the diffusion of magnetic adatoms must be found for applications in spintronics.
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页数：3
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