Magnetization plateaus in antiferromagnetic-(ferromagnetic)_{n} polymerized S=1/2 XXZ chains

Abstract

The plateau-non-plateau transition in the antiferromagnetic-(ferromagnetic)${}_n$ polymerized $S=1/2$ XXZ chains under the magnetic field is investigated. The universality class of this transition belongs to the Brezinskii-Kosterlitz-Thouless (BKT) type. The critical points are determined by level spectroscopy analysis of the numerical diagonalization data for $4\le p\le 13$ where $p(\equiv n+1)$ is the size of a unit cell. It is found that the critical strength of ferromagnetic coupling decreases with $p$ for small $p$ but increases for larger enough $p$. It is also found that the plateau for large $p$ is wide enough for moderate values of exchange coupling so that it should be easily observed experimentally. This is in contrast to the plateaus for $p=3$ chains which are narrow for a wide range of exchange coupling even away from the critical point.

References in corpus (1)

• Breakdown of the magnetization plateau of the S=1/2 ferromagnetic-ferromagnetic-antiferromagnetic trimerized spin chain with anisotropy

Cited by in corpus (4)

• Thermodynamics of spin-1/2 tetrameric Heisenberg antiferromagnetic chain
• Magnetic Properties of J-J-J' Quantum Heisenberg Chains with Spin S=1/2, 1, 3/2 and 2 in a Magnetic Field
• Spin structure factors and valence-bond-solid states of the trimerized Heisenberg chains in a magnetic field
• Magnetization plateaus and phase diagram in polymerized S=1/2 XXZ chains