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Electronic structure of RuSr2EuCu2O8 studied by x-ray absorption and photoemission spectroscopies.
- Source :
-
Physical Review B: Condensed Matter & Materials Physics . Jan-Jun2012, Vol. 85 Issue 1, p1-9. 9p. - Publication Year :
- 2012
-
Abstract
- Local electronic structures of ruthenocuprate RuSr2EuCu2O8 (RuEu-1212) were investigated by using x-ray absorption near-edge structure (XANES) and valence-band photoemission (VB-PES) measurements at room temperature. 80 K, and 25 K. The XANES results indicate that when RuEu-1212 is below Curie temperature, TM, electrons are transferred not only from Cu 3d states, but also from Ru 4 d states, to O 2p orbitals. Additionally, the partial spectral weight distributions derived from VB-PES measurements provide evidence of a weak overlapping between Ru 4 d states and strongly Cu 3d--O 2p hybridized states below the Fermi level, which results in a weak coupling between the CuO2 and RuO2 layers. The analysis of extended x-ray absorption fine structure shows that the appearance of weak ferromagnetism and superconductivity is accompanied by a significant decrease of dynamic local lattice distortions of high-shell Cu-Sr and Ru-Sr bonding in RuEu-1212. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 10980121
- Volume :
- 85
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Physical Review B: Condensed Matter & Materials Physics
- Publication Type :
- Academic Journal
- Accession number :
- 73438466
- Full Text :
- https://doi.org/10.1103/PhysRevB.85.014506