Structure of nanoscale polaron correlations in La1.2Sr1.8Mn2O7

Article

关键词: CHARGE-ORDERED STRIPES;    MAGNETOTRANSPORT PROPERTIES;    LA1-XCAXMNO3;    RESISTIVITY;    LASR2MN2O7;    MANGANITES;   

DOI  :  10.1103/PhysRevB.65.014427

来源: SCIE

【 摘 要 】

A system of strongly interacting electron-lattice polarons can exhibit charge and orbital order at sufficiently high polaron concentrations. In this study, the structure of short-range polaron correlations in the layered colossal magnetoresistive perovskite manganite La1.2Sr1.8Mn2O7 has been determined by a cystallographic analysis of broad satellite maxima observed in diffuse x-ray and neutron-scattering data, The resulting q approximate to (0.3,0, +/-1) modulation is a longitudinal octahedral-stretch mode, consistent with incommensurate Jahn-Teller-coupled charge-density-wave fluctuations, that implies an unusual orbital-stripe pattern parallel to the (100) directions.

【 授权许可】

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