Transition-metal-molecular sandwich nanowires as magnetic on/off switch

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Original languageEnglish
Article number053121
Journal / PublicationApplied Physics Letters
Issue number5
Publication statusPublished - 1 Aug 2011
Externally publishedYes


Using first-principles calculation, we predict that upon electron injection, transition-metal-benzene [Cr(Bz)] and transition-metal-ferrocene [Mn(Cp)] sandwich nanowires (SWNs) can switch from nonmagnetic semiconductor to magnetic half metal. The mechanism underlying this charge-induced transition is clarified through Stoner criterion. A relationship between induced magnetic moment and injected charge density is investigated. We also find that the magnetic coupling within the [Ti(Bz)] SWN can be also tuned though charge injection. Upon either hole or electron injection, the ground state of [Ti(Bz)] SWN can be switched from antiferromagnetic to ferromagnetic. © 2011 American Institute of Physics.

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