Novel magnetization plateaus in the spin-1/2 antiferromagnetic Heisenberg model on a kagome-strip chain

Quantum phase transitions are one of hot topics in the study of condensed matter physics. In geometrically frustrated quantum spin systems, at zero temperature, quantum phase transitions, such as magnetization plateaus, cusps, and jumps, are frequently induced by applying magnetic field. We focus on a 1D quantum spin frustrated systems, the spin-1/2 Heisenberg model on a kagome-strip chain. We study the magnetization plateaus of this model with three antiferromagnetic exchange interactions by the density-matrix renormalization group method. In a certain range of exchange parameters, we find twelve kinds of magnetization plateaus, nine of which have magnetic structures breaking either translational and/or refection symmetry spontaneously. In a most nontrivial plateau, 3/10 plateau, we find long-period magnetic structure with a period of four unit cells [1].
[1] K. Morita, T. Sugimoto, S. Sota, and T. Tohyama, arXiv:1710.00508.