Abstract
The local structure of correlated spin-orbit insulator Sr2-xMxIrO4 (M = K, La) has been investigated by Ir L3-edge extended X-ray absorption fine structure measurements. The measurements were performed as a function of temperature for different dopings induced by substitution of Sr with La or K. It is found that Ir-O bonds have strong covalency and they hardly show any change across the Néel temperature. In the studied doping range, neither Ir-O bonds nor their dynamics, measured by their mean square relative displacements, show any appreciable change upon carrier doping, indicating the possibility of nanoscale phase separation in the doped system. On the other hand, there is a large increase of the static disorder in Ir-Sr correlation, larger for K doping than La doping. Similarities and differences with respect to the local lattice displacements in cuprates are briefly discussed.
| Original language | English |
|---|---|
| Pages (from-to) | 23783-23788 |
| Number of pages | 6 |
| Journal | Physical Chemistry Chemical Physics |
| Volume | 20 |
| Issue number | 36 |
| DOIs | |
| Publication status | Published - Jan 1 2018 |
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ASJC Scopus subject areas
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry
Cite this
Determination of the local structure of Sr2-xMxIrO4 (M = K, La) as a function of doping and temperature. / Terashima, Kensei; Paris, Eugenio; Salas-Colera, Eduardo; Simonelli, Laura; Joseph, Boby; Wakita, Takanori; Horigane, Kazumasa; Fujii, Masanori; Kobayashi, Kaya; Horie, Rie; Akimitsu, Jun; Muraoka, Yuji; Yokoya, Takayoshi; Saini, Naurang Lal.
In: Physical Chemistry Chemical Physics, Vol. 20, No. 36, 01.01.2018, p. 23783-23788.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Determination of the local structure of Sr2-xMxIrO4 (M = K, La) as a function of doping and temperature
AU - Terashima, Kensei
AU - Paris, Eugenio
AU - Salas-Colera, Eduardo
AU - Simonelli, Laura
AU - Joseph, Boby
AU - Wakita, Takanori
AU - Horigane, Kazumasa
AU - Fujii, Masanori
AU - Kobayashi, Kaya
AU - Horie, Rie
AU - Akimitsu, Jun
AU - Muraoka, Yuji
AU - Yokoya, Takayoshi
AU - Saini, Naurang Lal
PY - 2018/1/1
Y1 - 2018/1/1
N2 - The local structure of correlated spin-orbit insulator Sr2-xMxIrO4 (M = K, La) has been investigated by Ir L3-edge extended X-ray absorption fine structure measurements. The measurements were performed as a function of temperature for different dopings induced by substitution of Sr with La or K. It is found that Ir-O bonds have strong covalency and they hardly show any change across the Néel temperature. In the studied doping range, neither Ir-O bonds nor their dynamics, measured by their mean square relative displacements, show any appreciable change upon carrier doping, indicating the possibility of nanoscale phase separation in the doped system. On the other hand, there is a large increase of the static disorder in Ir-Sr correlation, larger for K doping than La doping. Similarities and differences with respect to the local lattice displacements in cuprates are briefly discussed.
AB - The local structure of correlated spin-orbit insulator Sr2-xMxIrO4 (M = K, La) has been investigated by Ir L3-edge extended X-ray absorption fine structure measurements. The measurements were performed as a function of temperature for different dopings induced by substitution of Sr with La or K. It is found that Ir-O bonds have strong covalency and they hardly show any change across the Néel temperature. In the studied doping range, neither Ir-O bonds nor their dynamics, measured by their mean square relative displacements, show any appreciable change upon carrier doping, indicating the possibility of nanoscale phase separation in the doped system. On the other hand, there is a large increase of the static disorder in Ir-Sr correlation, larger for K doping than La doping. Similarities and differences with respect to the local lattice displacements in cuprates are briefly discussed.
UR - http://www.scopus.com/inward/record.url?scp=85053934064&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85053934064&partnerID=8YFLogxK
U2 - 10.1039/c8cp03756f
DO - 10.1039/c8cp03756f
M3 - Article
VL - 20
SP - 23783
EP - 23788
JO - Physical Chemistry Chemical Physics
JF - Physical Chemistry Chemical Physics
SN - 1463-9076
IS - 36
ER -