论文标题
dirac fermions和lacusb $ _ {2} $中可能的弱抗位置
Dirac Fermions and Possible Weak Antilocalization in LaCuSb$_{2}$
论文作者
论文摘要
由于这些sublattices中的粘结，分层的重金属晶格化合物最近作为潜在的泥土材料出现。我们在分层的SB Square-lattice材料LACUSB $ _ {2} $上报告量子传输和光谱数据。在使用角度分辨光发射光谱（ARPES）的电子带结构中观察到了在电子带结构中观察到的线性分散带交叉，并在电子带结构中观察到，以及准二维的费米表面。在磁势中观察到二维转运以及线性依赖性区域，这两者都表明了拓扑上非平凡的效应。 Shubnikov-de Haas（SDH）量子振荡的测量结果显示，有效的质量电子低于0.065 $ M_ {E} $，进一步证实了该材料中的Dirac Fermions。
Layered heavy-metal square-lattice compounds have recently emerged as potential Dirac fermion materials due to bonding within those sublattices. We report quantum transport and spectroscopic data on the layered Sb square-lattice material LaCuSb$_{2}$. Linearly dispersing band crossings, necessary to generate Dirac fermions, are experimentally observed in the electronic band structure observed using angle-resolved photoemission spectroscopy (ARPES), along with a quasi-two-dimensional Fermi surface. Weak antilocalization that arises from two-dimensional transport is observed in the magnetoresistance, as well as regions of linear dependence, both of which are indicative of topologically non-trivial effects. Measurements of the Shubnikov-de Haas (SdH) quantum oscillations show low effective mass electrons on the order of 0.065$m_{e}$, further confirming the presence of Dirac fermions in this material.
