Title : Enormous enhancement of p orbital magnetism in the lightly doped carbon chains
Abstract:
We present a path to tailor adapted magnetic properties in carbon chains. Our undoped carbon chains show p-orbital ferromagnetism up to 400K experimentally. As the ferromagnetism of carbon chains depends on chain-to-chain distance, a tunable ferromagnetism may occur if the carbon chains are compressed. We also demonstrate that the charge fluctuation of the free radical electrons triggered by a time-varying electric dipole moment leads to enormous p-orbital magnetism of carbon chain. By introducing 25% arsenic and 12.5% fluorine into the monoatomic carbon chain, the magnetic moment of the arsenic atom reaches 2.9 μB, which is ∼1.3 times stronger than magnetic moment of bulk Fe and meanwhile its exchange–correlation energy reaches 22 meV (∼270 K). Besides, the closely-packed carbon chains further developed for magneto-electric applications is highly possible if the substrate plays a role as an actuator.
What will audience learn from your presentation?
The audience should be able to apply the relationship between p-orbital ferromagnetism and the dynamics of free-radical electrons to design nano-magnets of carbon. The p-orbital magnetism in carbon chains triggered by kink structures and free-radical electrons may be the origin of unusual magnetism in nano-graphene.
The results can be elaborated to study unusual magnetism in nano-graphene.
