Phys. Rev. Lett. 89, 097205 (2002) [4 pages]Zener Polaron Ordering in Half-Doped ManganitesSee Also: Publisher's Note Received 20 April 2001; published 13 August 2002; publisher error corrected 3 September 2002 We have refined the crystal structures of a Pr0.60Ca0.40MnO3 single crystal from neutron diffraction data. The result at low temperature gives a superstructure that cannot be interpreted as Mn3+/Mn4+ charge ordering. The pattern of atom displacements suggests the trapping of electrons within pairs of Mn sites, involving both a local double exchange and a polaronic-like distortion. The two mechanisms act together to form vibronic localized electronic states: Zener polarons. We have confirmed this picture by showing how it elucidates the unconventional paramagnetic behavior of half-doped manganites. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.89.097205
DOI:
10.1103/PhysRevLett.89.097205
PACS:
75.30.Vn, 61.12.–q, 71.27.+a, 71.30.+h
See AlsoPublisher's Note: A. Daoud-Aladine, J. Rodríguez-Carvajal, L. Pinsard-Gaudart, M. T. Fernández-Díaz, and A. Revcolevschi, Publisher’s Note: Zener Polaron Ordering in Half-Doped Manganites [Phys. Rev. Lett. 89, 097205 (2002)], Phys. Rev. Lett. 89, 129902 (2002). |
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