In a combined experimental and theoretical study, we investigated how Fe and Co adlayers on W(110) affect the Dirac-type surface state (DSS). Angle-resolved photoelectron spectroscopy data show an increase in binding energy of 75meV and 107meV for Fe and Co, respectively. In order to identify the origin of the energy shift we performed first-principles calculations of the surface electronic structure. The inward surface relaxation of the uncovered W(110) surface is lifted by the adlayers. This structural change is one reason of the energy shift of the DSS. Furthermore, the Fe and Co adlayers change the surface potential, which results in an additional energy shift of the DSS.

在结合实验和理论研究中，我们研究了 W(110) 上的 Fe 和 Co 吸附层如何影响狄拉克型表面态 (DSS)。角度分辨光电子能谱数据显示，Fe 和 Co 的结合能分别增加了 75meV 和 107meV。为了确定能量转移的起源，我们对表面电子结构进行了第一性原理计算。未覆盖的 W(110) 表面的向内表面松弛被吸附层提升。这种结构变化是 DSS 能量转移的原因之一。此外，Fe 和 Co 吸附层会改变表面电位，从而导致 DSS 的额外能量转移。