Orbital ordering in transition-metal spinels
نویسندگان
چکیده
منابع مشابه
Orbital Ordering and Orbital Fluctuations in Transition Metal Oxides
We summarize some characteristic features of the frustrated magnetic interactions in spin-orbital models adequate for cubic transition metal oxides with orbital degeneracy. A generic tendency towards dimerization, found already in the degenerate Hubbard model, is confirmed for t2g but not for eg systems. In the t2g case the quantum orbital fluctuations are more pronounced and contribute to a st...
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Materials with the spinel crystal structure exhibit a diverse range of ground states and properties. These result from the interplay of spin, charge and orbital degrees of freedom over the geometrically frustrated pyrochlore sublattice. In certain spinels the interaction of ordered orbitals induces a structural distortion, due to the formation of clusters of directly bonded atoms called orbital...
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Spin correlations in metallic and insulating phases of V2O3 and its derivatives are investigated using magnetic neutron scattering. Metallic samples have incommensurate spin correlations varying little with hole doping. Paramagnetic insulating samples have spin correlations only among near neighbors. The transition from either of these phases into the low temperature insulating antiferromagneti...
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We study the classical version of the 120-model. This is an attractive nearest-neighbor system in three dimensions with XY (rotor) spins and interaction such that only a particular projection of the spins gets coupled in each coordinate direction. Although the Hamiltonian has only discrete symmetries, it turns out that every constant field is a ground state. Employing a combination of spin-wave...
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ژورنال
عنوان ژورنال: New Journal of Physics
سال: 2005
ISSN: 1367-2630
DOI: 10.1088/1367-2630/7/1/053