论文标题
非符号抗抗铁剂量的原子长度尺度上的表面和电子结构$ _5 $ _2 $ sb $ _6 $
Surface and electronic structure at atomic length scales of the non-symmorphic antiferromagnet Eu$_5$In$_2$Sb$_6$
论文作者
论文摘要
我们进行了扫描隧道显微镜和光谱（STM/STS）测量，以研究Zintl期EU $ _5 $ in $ _2 $ _2 $ SB $ _6 $，一种非符号抗fiferromagnet。非平凡的费米表面拓扑的理论预测稳定在非肌形成对称性的稳定性促进了我们的研究。在裂片（010）平面上，我们获得了条纹图案，这些图案与[in $ _2 $ sb $ _6 $] $^{10 - } $沿着晶体学$ c $ axis沿线的堆叠相关。沿$ a $轴的尝试裂解显示出更为复杂的模式。我们将非重建（010）和（081）表面的STS测量与DFT计算相结合，以进一步阐明欧盟$ _5 $ in $ _2 $ _2 $ sb $ _6 $的电子结构。从到目前为止的调查中，预测拓扑表面状态的直接实验证据仍然难以捉摸。
We performed Scanning Tunneling Microscopy and Spectroscopy (STM/STS) measurements to investigate the Zintl phase Eu$_5$In$_2$Sb$_6$, a non-symmorphic antiferromagnet. The theoretical prediction of a non-trivial Fermi surface topology stabilized by the non-symmorphic symmetry motivated our research. On the cleaved (010) plane, we obtained striped patterns that can be correlated to the stacking of the [In$_2$Sb$_6$]$^{10-}$ double chains along the crystallographic $c$ axis. The attempted cleavage along the $a$ axis revealed a more complex pattern. We combined the STS measurement on non-reconstructed (010) and (081) surfaces with DFT calculations to further elucidate the electronic structure of Eu$_5$In$_2$Sb$_6$. From our investigations so far, direct experimental evidence of the predicted topological surface states remains elusive.
