Contact-induced spin polarization in carbon nanotubes

被引：24

作者：

Ferreira, MS ^{[1
]}

Sanvito, S ^{[1
]}

机构：

[1] Univ Dublin Trinity Coll, Dept Phys, Dublin 2, Ireland

来源：

PHYSICAL REVIEW B | 2004年 / 69卷 / 03期

关键词：

D O I：

10.1103/PhysRevB.69.035407

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Motivated by the possibility of combining spintronics with molecular structures, we investigate the conditions for the appearance of spin polarization in low-dimensional tubular systems by contacting them to a magnetic substrate. We derive a set of general expressions describing the charge transfer between the tube and the substrate and the relative energy costs. The mean-field solution of the general expressions provides an insightful formula for the induced spin polarization. Using a tight-binding model for the electronic structure we are able to estimate the magnitude and the stability of the induced moment. This indicates that a significant magnetic moment in carbon nanotubes can be observed.

引用

页数：6

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