| Literature DB >> 18764131 |
M A Hossain1, Z Hu, M W Haverkort, T Burnus, C F Chang, S Klein, J D Denlinger, H-J Lin, C T Chen, R Mathieu, Y Kaneko, Y Tokura, S Satow, Y Yoshida, H Takagi, A Tanaka, I S Elfimov, G A Sawatzky, L H Tjeng, A Damascelli.
Abstract
Sr3(Ru(1-x)Mnx)2O7, in which 4d-Ru is substituted by the more localized 3d-Mn, is studied by x-ray dichroism and spin-resolved density functional theory. We find that Mn impurities do not exhibit the same 4+ valence of Ru, but act as 3+ acceptors; the extra eg electron occupies the in-plane 3d(x2-y2) orbital instead of the expected out-of-plane 3d(3z2-r2). We propose that the 3d-4d interplay, via the ligand oxygen orbitals, is responsible for this crystal-field level inversion and the material's transition to an antiferromagnetic, possibly orbitally ordered, low-temperature state.Entities:
Year: 2008 PMID： 18764131 DOI： 10.1103/PhysRevLett.101.016404
Source DB: PubMed Journal: Phys Rev Lett ISSN： 0031-9007 Impact factor: 9.161