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.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)