Symmetry Controlled Spin Polarized Conductance in Au Nanowires

Renato B. Pontes†‡, E. Z. da Silva§, A. Fazzio†‡ and Antnio J. R. da Silva†
Instituto de Fsica, Universidade de So Paulo, CP 66318, 05315-970 So Paulo, SP, Brazil, Centro de Cincias Naturais e Humanas, Universidade Federal do ABC, Santo Andr, SP, Brazil, and Instituto de Fsica “Gleb Wataghin”, UNICAMP, CP 6165 13083-970, Campinas - SP, Brazil
J. Am. Chem. Soc., 2008, 130 (30), pp 9897–9903
DOI: 10.1021/ja8020457
Publication Date (Web): July 3, 2008
Copyright © 2008 American Chemical Society
†

Universidade de So Paulo.

,
‡

Universidade Federal do ABC.

,
§

UNICAMP.

Abstract

Abstract Image

The fact that the resistance of propagating electrons in solids depends on their spin orientation has led to a new field called spintronics. With the parallel advances in nanoscience, it is now possible to talk about nanospintronics. Many works have focused on the study of charge transport along nanosystems, such as carbon nanotubes, graphene nanoribbons, or metallic nanowires, and spin dependent transport properties at this scale may lead to new behaviors due to the manipulation of a small number of spins. Metal nanowires have been studied as electric contacts where atomic and molecular insertions can be constructed. Here we describe what might be considered the ultimate spin device, namely, a Au thin nanowire with one Co atom bridging its two sides. We show that this system has strong spin dependent transport properties and that its local symmetry can dramatically change them, leading to a significant spin polarized conductance.

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History

  • Published In Issue July 30, 2008
  • Article ASAPJuly 03, 2008
  • Received: March 28, 2008

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