Infrared observation of the Hund's mechanism in an electron-doped manganite
arXiv:cond-mat/0601575 · doi:10.1103/PhysRevB.73.054425
Abstract
In the mid-infrared absorption of Sr{1-x}Ce{x}MnO{3} at low electron doping (x = 0.05), a band at 0.3 eV is fully replaced by another one at 0.9 eV as the system becomes antiferromagnetic (AF) of type . A weaker effect occurs at x = 0.10 for an AF phase of type . One thus directly measures the electron hopping energies for spin parallel and anti-parallel to that of the host ion. The Hund's, crystal-field, and Jahn-Teller splittings for the Mn{3+} ions in a Mn{4+} matrix, can also be derived.
arXiv commentIncludes 8 Postscript figures
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