Abstract
Carrier-induced lattice distortion (signature of strong electron-lattice interaction) in oxypnictide superconductors is found by a local structural study using extended x-ray absorption fine structure (EXAFS). Local lattice instability (polaron formation) is detected as an anomalous upturn of the mean-square relative displacement for the nearest neighbor distances (Fe-As) in LaFeAsO1-xFx (x0.07), implying a local lattice distortion that develops below 70 K and disappears at the superconducting critical temperature. Comparing the results with the lattice response in cuprate superconductors, intimate correlation between local lattice mode and superconductivity is revealed. The results suggest that strong electron-lattice interaction is present as a common ingredient in the microscopic mechanism of s uperconducting transition.
| Original language | English |
|---|---|
| Article number | 012094 |
| Journal | Journal of Physics: Conference Series |
| Volume | 190 |
| DOIs | |
| Publication status | Published - 2009 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
Local lattice response in LaFeAsO0.93F0.07 probed by x-ray absorption spectroscopy : Evidence for carrier-induced lattice distortion. / Oyanagi, H.; Zhang, C. J.; Sun, Z. H.; Kamihara, Yoichi; Hosono, H.
In: Journal of Physics: Conference Series, Vol. 190, 012094, 2009.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Local lattice response in LaFeAsO0.93F0.07 probed by x-ray absorption spectroscopy
T2 - Evidence for carrier-induced lattice distortion
AU - Oyanagi, H.
AU - Zhang, C. J.
AU - Sun, Z. H.
AU - Kamihara, Yoichi
AU - Hosono, H.
PY - 2009
Y1 - 2009
N2 - Carrier-induced lattice distortion (signature of strong electron-lattice interaction) in oxypnictide superconductors is found by a local structural study using extended x-ray absorption fine structure (EXAFS). Local lattice instability (polaron formation) is detected as an anomalous upturn of the mean-square relative displacement for the nearest neighbor distances (Fe-As) in LaFeAsO1-xFx (x0.07), implying a local lattice distortion that develops below 70 K and disappears at the superconducting critical temperature. Comparing the results with the lattice response in cuprate superconductors, intimate correlation between local lattice mode and superconductivity is revealed. The results suggest that strong electron-lattice interaction is present as a common ingredient in the microscopic mechanism of s uperconducting transition.
AB - Carrier-induced lattice distortion (signature of strong electron-lattice interaction) in oxypnictide superconductors is found by a local structural study using extended x-ray absorption fine structure (EXAFS). Local lattice instability (polaron formation) is detected as an anomalous upturn of the mean-square relative displacement for the nearest neighbor distances (Fe-As) in LaFeAsO1-xFx (x0.07), implying a local lattice distortion that develops below 70 K and disappears at the superconducting critical temperature. Comparing the results with the lattice response in cuprate superconductors, intimate correlation between local lattice mode and superconductivity is revealed. The results suggest that strong electron-lattice interaction is present as a common ingredient in the microscopic mechanism of s uperconducting transition.
UR - http://www.scopus.com/inward/record.url?scp=73449126524&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=73449126524&partnerID=8YFLogxK
U2 - 10.1088/1742-6596/190/1/012094
DO - 10.1088/1742-6596/190/1/012094
M3 - Article
AN - SCOPUS:73449126524
VL - 190
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
SN - 1742-6588
M1 - 012094
ER -