Lieb-Schultz-Mattis-type filling constraints in the 1651 magnetic space groups

Lieb-Schultz-Mattis-type filling constraints in the 1651 magnetic space groups
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DOI:
10.1103/physrevb.97.165117
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发表时间:
2018-02
期刊:
影响因子:
3.7
通讯作者:
Haruki Watanabe
Haruki Watanabe
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Haruki Watanabe

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我们提出了第一个系统的填充约束的研究,以实现一个'平凡'绝缘体对称下的磁空间群$\mathcal{M}$。填充$\nu$必须是$m^{\mathcal{M}}$的整数倍,以避免自发的对称性破缺或在带隙相位中的分数化。我们改进了文献中的$m^{\mathcal{M}}$的值,并证明了对大多数磁空间群的约束的紧性。这一结果对具有碎裂效应的奇异磁体的材料研究有一定的指导意义。
We present the first systematic study of the filling constraints to realize a `trivial' insulator symmetric under magnetic space group $\mathcal{M}$. The filling $\nu$ must be an integer multiple of $m^{\mathcal{M}}$ to avoid spontaneous symmetry breaking or fractionalization in gapped phases. We improve the value of $m^{\mathcal{M}}$ in the literature and prove the tightness of the constraint for the majority of magnetic space groups. The result may shed light on the material search of exotic magnets with fractionalization.