TY - JOUR
T1 - Relationship between charge stripe order and structural phase transitions in La1.875Ba0.125-xSrxCuO4
AU - Kimura, H.
AU - Noda, Y.
AU - Goka, H.
AU - Fujita, M.
AU - Yamada, K.
AU - Mizumaki, M.
AU - Ikeda, N.
AU - Ohsumi, H.
N1 - Funding Information:
The authors thank M. Ito, K. Machida, H. Yamase, and O. Zacher for valuable discussions. This work was supported in part by a Grant-In-Aid for Young Scientists B (13740216 and 15740194), Scientific Research B (14340105), Scientific Research on Priority Areas (12046239), and Creative Scientific Research (13NP0201) from the Japanese Ministry of Education, Science, Sports and Culture, and by the Core Research for Evolutional Science and Technology (CREST) from the Japan Science and Technology Corporation. The synchrotron x-ray experiments were carried out at the SPring-8 facility (Proposal No. 2002A0314, R03A46XU, 2003B0117, and 2004A2117).
PY - 2004/10
Y1 - 2004/10
N2 - The nature of charge stripe order and its relationship with structural phase transitions were studied using synchrotron x-ray diffraction in La 1.875Ba0.125-xSrxCuO4 (0.05≤x≤0.10). For x=0.05, as temperature increased, incommensurate superlattice peaks associated with the charge order disappeared just at the structural phase transition temperature, Td2. However, for x=0.075 and 0.09, the superlattice peaks still existed as a short range correlation even above Td2, indicating a precursor of charge ordering. Furthermore, temperature dependences of the superlattice peak intensity, correlation length, and incommensurability for x=0.05 are different from those for x=0.075 and 0.09. These results suggest that the transition process into the charge stripe order strongly correlates with the order of the structural phase transitions. A quantitative comparison of the structure factor associated with the charge order have been also made for all the samples.
AB - The nature of charge stripe order and its relationship with structural phase transitions were studied using synchrotron x-ray diffraction in La 1.875Ba0.125-xSrxCuO4 (0.05≤x≤0.10). For x=0.05, as temperature increased, incommensurate superlattice peaks associated with the charge order disappeared just at the structural phase transition temperature, Td2. However, for x=0.075 and 0.09, the superlattice peaks still existed as a short range correlation even above Td2, indicating a precursor of charge ordering. Furthermore, temperature dependences of the superlattice peak intensity, correlation length, and incommensurability for x=0.05 are different from those for x=0.075 and 0.09. These results suggest that the transition process into the charge stripe order strongly correlates with the order of the structural phase transitions. A quantitative comparison of the structure factor associated with the charge order have been also made for all the samples.
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U2 - 10.1103/PhysRevB.70.134512
DO - 10.1103/PhysRevB.70.134512
M3 - Article
AN - SCOPUS:42749104588
SN - 0163-1829
VL - 70
SP - 134512-1-134512-8
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 13
M1 - 134512
ER -