Orbital Ordering in Ferromagnetic Lu_2V_2O_7(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)

概要

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We have observed the orbital ordering in the ferromagnetic Mott-insulator Lu_2V_2O_7 by the polarized neutron diffraction technique. The orbital ordering pattern determined from the observed magnetic form factors can be explained in terms of a linear combination of wave functions |yz>, |zx> and |xy>; |0>=√<1/3|xy>>+√<1/3|yz>>+√<1/3|zx>> α|(x+y+z)^2-r^2>, where each orbital is extended toward the center-of-mass of the V tetrahedron. We discuss the stability of the ferromagnetic Lu_2V_2O_7, using a Hubbard Hamiltonian with these three orbitals.
社団法人日本物理学会の論文
2005-03-15