Tetramerisation of a frustrated spin-1/2 chain
arXiv:cond-mat/0209278 · doi:10.1103/PhysRevLett.91.067202
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 tetramerised phase with three different bond lengths is found. We argue that the zig-zag spin-1/2 chain LiV$_2$O$_5$ might be a good candidate to observe such a phase.