摘要
The magnetization curve of the two-dimensional spin-1/2 J1-J2 Heisenberg model is investigated by using the Chern-Simons theory under mean-field approximations. We find that the magnetization curve increases monotonically for J2/J1<0.267949, where the system under zero external field is in the antiferromagnetic Néel phase. For larger ratios of J2/J1, various plateaus will appear in the magnetization curve. In particular, in the disordered phase, our results support the existence of the M/Msat = 1/2 plateau, and predict a plateau at M/Msat = 1/3. Verification of these interesting results would indicate a strong connection between the frustrated antiferromagnetic system and the quantum Hall system.
原文 | 英語 |
---|---|
文章編號 | 184416 |
頁(從 - 到) | 1844161-1844166 |
頁數 | 6 |
期刊 | Physical Review B - Condensed Matter and Materials Physics |
卷 | 66 |
發行號 | 18 |
出版狀態 | 已發佈 - 2002 11月 1 |
ASJC Scopus subject areas
- 電子、光磁材料
- 凝聚態物理學