Tetramerization of a frustrated spin-1/2 chain.
We investigate a model of a frustrated spin-1/2 Heisenberg chain coupled to adiabatic phonons with a general form of magnetoelastic coupling. For large enough frustration and lattice coupling, a new tetramerized phase with three different bond lengths is found. We argue that the zigzag spin-1/2 chain LiV2O5 might be a good candidate to observe such a phase.
Becca
Federico
F
INFM-Democritos, National Simulation Centre, and SISSA, I-34014 Trieste, Italy.
Mila
Frédéric
F
Poilblanc
Didier
D