New States of Quantum Matter (NSQM) - Publications

We present the phase diagram of the frustrated ferromagnetic S=1/2 Heisenberg J₁-J₂ chain in a magnetic field, obtained by large scale exact diagonalizations and density matrix renormalizatio n group simulations. A vector chirally ordered state, metamagnetic behavior and a sequence of spin-multipolar Luttinger liquid phases up to hexadecupolar kind are found. We provide numerical evidence for a novel locking mechanism, which can drive spiral states towards spin-multipolar phases, such as quadrupolar or octupolar phases. Our results also shed new light on previously discovered spin-multipolar phases in two-dimensional S=1/2 quantum magnets in a magnetic field.