Electronic Structure of Sr_2FeMoO_6

D. D. Sarma; Priya Mahadevan; T. Saha-Dasgupta; Sugata Ray; Ashwani Kumar

doi:10.1103/PhysRevLett.85.2549

Electronic Structure of Sr_2FeMoO_6

Strongly Correlated Electrons 2009-10-31 v1

Authors: D. D. Sarma , Priya Mahadevan , T. Saha-Dasgupta , Sugata Ray , Ashwani Kumar

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Abstract

We have analysed the unusual electronic structure of Sr_2FeMoO_6 combining ab-initio and model Hamiltonian approaches. Our results indicate that there are strong enhancements of the intraatomic 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 renormalised interaction strengths.

Keywords

electronic structure

Cite

@article{arxiv.cond-mat/0008401,
  title  = {Electronic Structure of Sr_2FeMoO_6},
  author = {D. D. Sarma and Priya Mahadevan and T. Saha-Dasgupta and Sugata Ray and Ashwani Kumar},
  journal= {arXiv preprint arXiv:cond-mat/0008401},
  year   = {2009}
}

Comments

To appear in Phys. Rev. Lett

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