Liquid-like spatial distribution of magnetic polarons revealed by neutron scattering in La{1-x}Ca{x}MnO3

Details Liquid-like spatial distribution of magnetic polarons revealed by neutron scattering in La{1-x}Ca{x}MnO3 Liquid-like spatial distribution of magnetic polarons revealed by neutron scattering in La{1-x}Ca{x}MnO3

1998-06-23

arxiv.org/abs/cond-mat/9806272v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages 4 figures

Scientific paper

10.1103/PhysRevLett.81.1957

Elastic neutron scattering experiments performed in semi-conducting La(1-x)Ca(x)MnO3 single crystals (x=0.05, 0.08), reveal new features in the problem of electronic phase separation and metal insulator transition. Below TN, the observation of a broad magnetic modulation in the q-dependent scattering intensity, centered at nearly identical qm whatever the q direction, can be explained by a liquid-like spatial distribution of similar magnetic droplets. A semi-quantitative description of their magnetic state, diameter, and average distance, can be done using a two-phase model. Such a picture can explain the anomalous characteristics of the spin wave branches and may result from unmixing forces between charge carriers predicted from the s-d model.

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