2008/04/07 by A. C. Komarek, S. V. Streltsov, M. Isobe +13
Physics and Astronomy · #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.101.167204
published as Phys. Rev. Lett. 101, 167204 (2008)
arxiv created 2008/04/07 · arxiv updated 2009/12/01
Combining infrared reflectivity, transport, susceptibility and several diffraction techniques, we find compelling evidence that CaCrO3 is a rare case of a metallic and antiferromagnetic transition-metal oxide with a three-dimensional electronic structure. LSDA calculations correctly describe the metallic behavior as well as the anisotropic magnetic ordering pattern of C type: The high Cr valence state induces via sizeable pd hybridization remarkably strong next-nearest neighbor interactions stabilizing this ordering. The subtle balance of magnetic interactions gives rise to magneto-elastic coupling, explaining pronounced structural anomalies observed at the magnetic ordering transition.