Nature Physics, Published online: 07 October 2026; doi:10.1038/s41567-026-03465-3
Neutron spectroscopy measurements combined with tensor network simulations have placed the long-studied quantum spin-chain compound CuGeO3 in a spontaneously dimerized phase predicted in 1982. In this system, fractionalized excitations evolve from nearly free spinons to tightly bound triplons across energy scales within a single spectrum.
