2015年11月
Magnetization plateaus of an easy-axis kagome antiferromagnet with extended interactions
PHYSICAL REVIEW B
- ,
- ,
- ,
- 巻
- 92
- 号
- 17
- 開始ページ
- 174402-1
- 終了ページ
- 174402-14
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1103/PhysRevB.92.174402
- 出版者・発行元
- AMER PHYSICAL SOC
We investigate the properties in finite magnetic field of an extended anisotropic XXZ spin-1/2 model on the kagome lattice, originally introduced by Balents, Fisher, and Girvin [Phys. Rev. B 65, 224412 (2002)]. The magnetization curve displays plateaus at magnetization m = 1/6 and 1/3 when the anisotropy is large. Using low-energy effective constrained models (quantum loop and quantum dimer models), we discuss the nature of the plateau phases, found to be crystals that break discrete rotation and/or translation symmetries. Large-scale quantum Monte Carlo simulations were carried out in particular for the m = 1/6 plateau. We first map out the phase diagram of the effective quantum loop model with an additional loop-loop interaction to find stripe order around the point relevant for the original model as well as a topological Z(2) spin liquid. The existence of a stripe crystalline phase is further evidenced by measuring both standard structure factor and entanglement entropy of the original microscopic model.
- リンク情報
- ID情報
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- DOI : 10.1103/PhysRevB.92.174402
- ISSN : 2469-9950
- eISSN : 2469-9969
- Web of Science ID : WOS:000364013100003