Magnetic properties of the spin-12 XXZ model on the Shastry-Sutherland lattice: Effect of long-range interactions

Takahumi Suzuki, Yusuke Tomita, Naoki Kawashima

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Abstract

We study magnetic properties of the spin- 1 2 Ising-like XXZ model on the Shastry-Sutherland lattices with long-range interactions, using the quantum Monte Carlo method. This model shows magnetization plateau phases at one-half and one-third of the saturation magnetization when additional couplings are considered. We investigate the finite temperature transition to one-half and one-third plateau phases. The obtained results suggest that the former case is of the first order and the latter case is of the second order. We also find that the system undergoes two successive transitions with the two-dimensional Ising model universality although there is a single phase transition in the Ising limit case. Finally, we estimate the coupling ratio to explain the magnetization process observed in TmB4.

Original languageEnglish
Article number180405
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume80
Issue number18
DOIs
Publication statusPublished - 2009 Nov 5
Externally publishedYes

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ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

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