Abstract
We have used the combination of Fe K-edge and Ir L3-edge x-ray absorption measurements as a function of temperature to investigate local atomic displacements in the newly discovered Ca10Ir4As8(Fe2As2)5 superconducting system. We find relatively relaxed Fe-Fe atomic pair correlations with large displacements in the FeAs4 tetrahedra, revealed by Fe K-edge extended x-ray absorption fine structure (EXAFS) analysis. Similarly, the temperature dependence of Ir L3-edge EXAFS shows nanoscale disorder in the IrAs layer that should have a significant effect on the active FeAs-layer characteristics. Furthermore, x-ray absorption near edge structure data are presented to discuss the evolution of the unoccupied electronic states revealing the marginal role of spin-orbit coupling, while the interlayer interactions and disorder should be important for describing the physics of the Ca10Ir4As8(Fe2As2)5 system.
| Original language | English |
|---|---|
| Article number | 094508 |
| Number of pages | 6 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 90 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - Sep 12 2014 |
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ASJC Scopus subject areas
- Condensed Matter Physics
- Electronic, Optical and Magnetic Materials
Cite this
Determination of temperature-dependent atomic displacements in the Ca10Ir4As8(Fe2As2)5 superconductor with a metallic spacer layer. / Paris, E.; Joseph, B.; Iadecola, A.; Marini, C.; Kudo, K.; Mitsuoka, D.; Nohara, M.; Mizokawa, T.; Saini, N. L.
In: Physical Review B - Condensed Matter and Materials Physics, Vol. 90, No. 9, 094508, 12.09.2014.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Determination of temperature-dependent atomic displacements in the Ca10Ir4As8(Fe2As2)5 superconductor with a metallic spacer layer
AU - Paris, E.
AU - Joseph, B.
AU - Iadecola, A.
AU - Marini, C.
AU - Kudo, K.
AU - Mitsuoka, D.
AU - Nohara, M.
AU - Mizokawa, T.
AU - Saini, N. L.
PY - 2014/9/12
Y1 - 2014/9/12
N2 - We have used the combination of Fe K-edge and Ir L3-edge x-ray absorption measurements as a function of temperature to investigate local atomic displacements in the newly discovered Ca10Ir4As8(Fe2As2)5 superconducting system. We find relatively relaxed Fe-Fe atomic pair correlations with large displacements in the FeAs4 tetrahedra, revealed by Fe K-edge extended x-ray absorption fine structure (EXAFS) analysis. Similarly, the temperature dependence of Ir L3-edge EXAFS shows nanoscale disorder in the IrAs layer that should have a significant effect on the active FeAs-layer characteristics. Furthermore, x-ray absorption near edge structure data are presented to discuss the evolution of the unoccupied electronic states revealing the marginal role of spin-orbit coupling, while the interlayer interactions and disorder should be important for describing the physics of the Ca10Ir4As8(Fe2As2)5 system.
AB - We have used the combination of Fe K-edge and Ir L3-edge x-ray absorption measurements as a function of temperature to investigate local atomic displacements in the newly discovered Ca10Ir4As8(Fe2As2)5 superconducting system. We find relatively relaxed Fe-Fe atomic pair correlations with large displacements in the FeAs4 tetrahedra, revealed by Fe K-edge extended x-ray absorption fine structure (EXAFS) analysis. Similarly, the temperature dependence of Ir L3-edge EXAFS shows nanoscale disorder in the IrAs layer that should have a significant effect on the active FeAs-layer characteristics. Furthermore, x-ray absorption near edge structure data are presented to discuss the evolution of the unoccupied electronic states revealing the marginal role of spin-orbit coupling, while the interlayer interactions and disorder should be important for describing the physics of the Ca10Ir4As8(Fe2As2)5 system.
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U2 - 10.1103/PhysRevB.90.094508
DO - 10.1103/PhysRevB.90.094508
M3 - Article
VL - 90
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 1098-0121
IS - 9
M1 - 094508
ER -