Macroscopic Magnetization Jumps due to Independent Magnons in Frustrated Quantum Spin Lattices
Macroscopic Magnetization Jumps due to Independent Magnons in Frustrated Quantum Spin Lattices
For a class of frustrated spin lattices including the Kagomé lattice we construct exact eigenstates consisting of several independent, localized one-magnon states and argue that they are ground states for high magnetic fields. If the maximal number of local magnons scales with the number of spins in the system, which …