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arXiv · 0909.1944

Electronic self-organization in the single-layer manganite $\rm Pr_{\it 1-x}Ca_{\it 1+x}MnO_4$

F. Ye·Songxue Chi·J. A. Fernandez-Baca·A. Moreo·E. Dagotto·J. W. Lynn·R. Mathieu·Y. Kaneko·Y. Tokura·Pengcheng Dai
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Abstract

We use neutron scattering to investigate the doping evolution of the magnetic correlations in the single-layer manganite $\rm Pr_{\it 1-x}Ca_{\it 1+x}MnO_4$, away from the $x=0.5$ composition where the CE-type commensurate antiferromagnetic (AF) structure is stable. We find that short-range incommensurate spin correlations develop as the system is electron doped ($x<0.5$), which coexist with the CE-type AF order. This suggests that electron doping in this system induces an inhomogeneous electronic self-organization, where commensurate AF patches with $x=0.5$ are separated by electron-rich domain walls with short range magnetic correlations. This behavior is strikingly different than for the perovksite $\rm Pr_{\it 1-x}Ca_{\it x}MnO_3$, where the long-range CE-type commensurate AF structure is stable over a wide range of electron or hole doping around $x=0.5$.

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F. Ye, Songxue Chi, J. A. Fernandez-Baca, A. Moreo, E. Dagotto, J. W. Lynn, R. Mathieu, Y. Kaneko, Y. Tokura, Pengcheng Dai. 2009-09-10. Electronic self-organization in the single-layer manganite $\rm Pr_{\it 1-x}Ca_{\it 1+x}MnO_4$. https://doi.org/10.1103/physrevlett.103.167202

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