Infrared observation of the Hund's mechanism in an electron-doped manganite

Details Infrared observation of the Hund's mechanism in an electron-doped manganite Infrared observation of the Hund's mechanism in an electron-doped manganite

2006-01-25

arxiv.org/abs/cond-mat/0601575v1

Phys. Rev. B 73, 054425 (2006)

Physics

Condensed Matter

Strongly Correlated Electrons

Includes 8 Postscript figures

Scientific paper

10.1103/PhysRevB.73.054425

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 $G$. A weaker effect occurs at x = 0.10 for an AF phase of type $C$. 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.

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