Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2007-10-16
Physical Review B 77 (2008) 054421
Physics
Condensed Matter
Strongly Correlated Electrons
10 pages
Scientific paper
10.1103/PhysRevB.77.054421
Using magnetization, specific heat and neutron scattering measurements, as well as exact calculations on realistic models, the magnetic properties of the \lacuvo compound are characterized on a wide temperature range. At high temperature, this oxide is well described by strongly correlated atomic $S$=1/2 spins while decreasing the temperature it switches to a set of weakly interacting and randomly distributed entangled pseudo spins $\tilde S=1/2$ and $\tilde S=0$. These pseudo-spins are built over frustrated clusters, similar to the kagom\'e building block, at the vertices of a triangular superlattice, the geometrical frustration intervening then at different scales.
Ballou Rafik
Bordet Pierre
Braithwaite Daniel
Brion Sophie de
Canals Benjamin
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