Department of Physics and Astronomy and the Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, Lincoln, NE 68588-0111, USA.
J Phys Condens Matter. 2010 Jun 23;22(24):245501. doi: 10.1088/0953-8984/22/24/245501. Epub 2010 May 26.
We investigated the electron-phonon coupling (EPC), in the vicinity of the Fermi level, for the surface-weighted states of Mo(112) from high resolution angle-resolved photoemission data taken parallel to the surface corrugation (i.e. [Formula: see text]). The surface-weighted bandwidth may be discussed in terms of electron-electron interactions, electron impurity scattering and electron-phonon coupling and exhibits a mass enhancement factor λ = 0.42, within the Debye model, determined from the experimentally derived self-energy. Gold overlayers suppress the mass enhancement of the Mo(112) surface-weighted band crossing the Fermi level at 0.54 Å(-1).
我们研究了在费米能级附近的电子-声子耦合（EPC），来自于沿表面波纹（即[Formula: see text]）方向获取的高分辨率角分辨光电子能谱数据的表面加权态。表面加权带宽可以用电子-电子相互作用、电子杂质散射和电子-声子耦合来讨论，并表现出质量增强因子λ=0.42，这是根据实验得出的自能在德拜模型中确定的。金覆盖层抑制了穿过费米能级的 Mo(112)表面加权能带的质量增强，该能带在 0.54 Å(-1)处交叉。
