Crystal-field level inversion in lightly Mn-doped Sr3Ru2O7
| Autor: | Hossain, M. A., Hu, Z., Haverkort, M. W., Burnus, T., Chang, C. F., Klein, S., Denlinger, J. D., Lin, H. -J., Chen, C. T., Mathieu, R., Kaneko, Y., Tokura, Y., Satow, S., Yoshida, Y., Takagi, H., Tanaka, A., Elfimov, I. S., Sawatzky, G. A., Tjeng, L. H., Damascelli, A. |
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| Rok vydání: | 2008 |
| Předmět: | |
| Zdroj: | Phys. Rev. Lett. 101, 016404 (2008) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevLett.101.016404 |
| Popis: | Sr3(Ru1-xMnx)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 3dx2-y2 orbital instead of the expected out-of-plane 3d3z2-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. Comment: A high-resolution version can be found at http://www.physics.ubc.ca/~quantmat/ARPES/PUBLICATIONS/Articles/MnSr3Ru2O7_XAS.pdf |
| Databáze: | arXiv |
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