Relationship between charge stripe order and structural phase transitions in La1.875Ba0.125-xSrxCuO4

H. Kimura, Y. Noda, H. Goka, M. Fujita, K. Yamada, M. Mizumaki, Naoshi Ikeda, H. Ohsumi

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Abstract

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.

Original languageEnglish
Article number134512
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume70
Issue number13
DOIs
Publication statusPublished - Oct 2004
Externally publishedYes

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ASJC Scopus subject areas

  • Condensed Matter Physics

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