Noncollinear phases in moire magnets
Noncollinear phases in moire magnets
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DOI：
10.1073/pnas.2000347117
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发表时间：
2020-05-19
影响因子：
11.1
通讯作者：
Balents, Leon
中科院分区：
文献类型：
--
作者：
Hejazi, Kasra;Luo, Zhu-Xi;Balents, Leon
本文介绍了一个用连续场理论研究二维货车范德华磁体莫尔结构的一般框架。形式主义消除了准周期性，并允许磁结构及其激发的充分理解。特别是，我们详细分析了扭曲的双层Neel反铁磁体的蜂窝晶格。得到了具有非共线扭曲相的丰富相图，并进一步计算了自旋波。直接延伸到锯齿形反铁磁体和铁磁体也提出。我们预计的结果和形式主义表明，导致广泛的应用基础研究和实验。
We introduce a general framework to study moire structures of two-dimensional Van der Waals magnets using continuum field theory. The formalism eliminates quasiperiodicity and allows a full understanding of magnetic structures and their excitations. In particular, we analyze in detail twisted bilayers of Neel antiferromagnets on the honeycomb lattice. A rich phase diagram with noncollinear twisted phases is obtained, and spin waves are further calculated. Direct extensions to zigzag antiferromagnets and ferromagnets are also presented. We anticipate the results and formalism demonstrated to lead to a broad range of applications to both fundamental research and experiments.