Author(s): Julien Fitouchi and Natalia Chepiga We investigate the zero magnetization and ground state phase diagram of a spin-$1/2$ chain with competing ferromagnetic nearest-neighbor and antiferromagnetic next-nearest-neighbor exchange couplings in the strongly interacting regime. Using density matrix renormalization group (DMRG) simulations, w… [Phys. Rev. Lett. 137, 036503] Published Tue Jul 14, 2026