title: Tetramerization of a frustrated spin-1/2 chain.
abstract: 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.
authors.affiliation: INFM-Democritos, National Simulation Centre, and SISSA, I-34014 Trieste, Italy.
authors.forename: Federico
authors.initials: F
authors.lastname: Becca
authors.forename: Frédéric
authors.initials: F
authors.lastname: Mila
authors.forename: Didier
authors.initials: D
authors.lastname: Poilblanc