title: Electronic structure of Sr2FeMoO6
abstract: We have analyzed the unusual electronic structure of Sr2FeMoO6 combining ab initio and model Hamiltonian approaches. Our results indicate that there are strong enhancements of the intra-atomic exchange strength at the Mo site as well as the antiferromagnetic coupling strength between Fe and Mo sites. We discuss the possibility of a negative effective Coulomb correlation strength ( U(eff)) at the Mo site due to these renormalized interaction strengths.
authors.affiliation: Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560012, India.
authors.initials: DD
authors.lastname: Sarma
authors.initials: P
authors.lastname: Mahadevan
authors.initials: T
authors.lastname: Saha-Dasgupta
authors.initials: S
authors.lastname: Ray
authors.initials: A
authors.lastname: Kumar