Download Unconventional magnetic properties of the low

Unconventional magnetic properties of the low-dimensional
ruthenates
Sergey Streltsov, Institute of Metal Physics, Ekaterinburg, Russia
On the example of several Ru oxides we will discuss such effects as
 Effective reduction of the dimensionality due to orbital degrees of
freedom (Tl2Ru2O7 [1]);
 Suppression of the magnetic moments in the 4d and 5d transition
metal oxides (Ba4Ru3O10 [2], Ba3CoRu2O9 [3]);
 Competition between the conventional double exchange, leading to
ferromagnetism, and the tendency for electrons with strongly
overlapping orbitals and large intersite hopping to form a
nonmagnetic singlet molecular orbitals on a dimer (Ba3NaRu2O9) [4];
 Orbital-selective behavior, valence bond liquid state and other
consequences of the molecular orbitals formation (Li2RuO3) [4-7];
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