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.

引用

页数：3

共 35 条

[1] Reduced backscattering in potassium-doped nanotubes:: Ab initio and semiempirical simulations [J].

Adessi, C ;

Roche, S ;

Blase, X .

PHYSICAL REVIEW B, 2006, 73 (12)

[2] CAPILLARITY-INDUCED FILLING OF CARBON NANOTUBES [J].

AJAYAN, PM ;

IIJIMA, S .

NATURE, 1993, 361 (6410) :333-334

[3] LOCALIZED MAGNETIC STATES IN METALS [J].

ANDERSON, PW .

PHYSICAL REVIEW, 1961, 124 (01) :41-&

[4] Anomalous Doping Effects on Charge Transport in Graphene Nanoribbons [J].

Biel, Blanca ;

Blase, X. ;

Triozon, Francois ;

Roche, Stephan .

PHYSICAL REVIEW LETTERS, 2009, 102 (09)

[5] Preserved conductance in covalently functionalized silicon nanowires [J].

Blase, X. ;

Fernandez-Serra, M. -V. .

PHYSICAL REVIEW LETTERS, 2008, 100 (04)

[6] Compensation, interstitial defects, and ferromagnetism in diluted ferromagnetic semiconductors [J].

Bouzerar, G ;

Ziman, T ;

Kudrnovsky, J .

PHYSICAL REVIEW B, 2005, 72 (12)

[7] Defects, quasibound states, and quantum conductance in metallic carbon nanotubes [J].

Choi, HJ ;

Ihm, J ;

Louie, SG ;

Cohen, ML .

PHYSICAL REVIEW LETTERS, 2000, 84 (13) :2917-2920

[8] Energetics and electronic structures of individual atoms adsorbed on carbon nanotubes [J].

Durgun, E ;

Dag, S ;

Ciraci, S ;

Gulseren, O .

JOURNAL OF PHYSICAL CHEMISTRY B, 2004, 108 (02) :575-582

[9] Induced magnetic ordering by proton irradiation in graphite -: art. no. 227201 [J].

Esquinazi, P ;

Spemann, D ;

Höhne, R ;

Setzer, A ;

Han, KH ;

Butz, T .

PHYSICAL REVIEW LETTERS, 2003, 91 (22)

[10] Conductance, surface traps, and passivation in doped silicon nanowires [J].

Fernandez-Serra, M. -V. ;

Adessi, Ch. ;

Blase, X. .

NANO LETTERS, 2006, 6 (12) :2674-2678

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