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arXiv 1809.09228cond-mat.str-el
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量子反铁磁体${\text{BiCu}}_{2}{\text{PO}}_{6}$中准一维三体子的非平凡拓扑

Non-trivial topology of the quasi-one-dimensional triplons in the quantum antiferromagnet ${\text{BiCu}}_{2}{\text{PO}}_{6}$

Maik Malki, Leanna Splinter, Götz S. Uhrig

备注：
12 pages main text (3 figures), 14 pages supplemental materials (3 figures)
发表信息：
Phys. Rev. Research 1, 033197 (2019)
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摘要：

物理系统的拓扑性质引起了人们极大的兴趣。近年来，具有和不具有磁有序的磁性固体化合物成为研究的热点。我们证明了${\text{BiCu}}_{2}{\text{PO}}_{6}$是第一个具有有限Zak相位的带隙量子反铁磁体，它表征了一维系统，而只有第二个具有拓扑非平凡的三重子激发。令人惊讶的是，尽管体边界对应没有局部边缘模式发生。这种意想不到的行为解释的区别直接和间接的差距之间的三体带。

英文摘要：

Topological properties of physical systems are attracting tremendous interest. Recently, magnetic solid state compounds with and without magnetic order have become a focus. We show that ${\text{BiCu}}_{2}{\text{PO}}_{6}$ is the first gapful quantum antiferromagnet with a finite Zak phase, which characterises one-dimensional systems, and only the second with topological non-trivial triplon excitations. Surprisingly, in spite of the bulk-boundary correspondence no localised edge mode occurs. This unexpected behaviour is explained by the distinction between direct and indirect gaps among the triplon bands.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

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