论文标题
Cutic PTBI2的费米水平附近的六倍费米亚
Sixfold fermion near the Fermi level in cubic PtBi2
论文作者
论文摘要
我们表明，立方体化合物PTBI2是拓扑半学，托管了六倍的带触点，靠近费米水平。使用角度分辨光发射光谱，我们绘制系统的带结构，这与密度功能理论的结果非常吻合。此外，通过采用低能量有效的哈密顿量有效靠近交叉点，我们研究了磁场对六倍费米昂的影响。后者将总共二十个Weyl锥分成二十个Weyl锥，以在对角线方向[111]方向上。我们的结果标志着Cubic PTBI2，是研究狄拉克和Weyl Semimetals以外的无间隙拓扑系统的运输特性的理想候选者。
We show that the cubic compound PtBi2, is a topological semimetal hosting a sixfold band touching point in close proximity to the Fermi level. Using angle-resolved photoemission spectroscopy, we map the bandstructure of the system, which is in good agreement with results from density functional theory. Further, by employing a low energy effective Hamiltonian valid close to the crossing point, we study the effect of a magnetic field on the sixfold fermion. The latter splits into a total of twenty Weyl cones for a Zeeman field oriented in the diagonal, [111] direction. Our results mark cubic PtBi2, as an ideal candidate to study the transport properties of gapless topological systems beyond Dirac and Weyl semimetals.
