Mo $_{1-x}$ Re $_x$合金中电子拓扑跃迁引起的电子态局域化：光电子能谱研究
Localization of electronic states resulting from electronic topological transitions in the Mo$_{1-x}$Re$_x$ alloys: A photoemission study
摘要：
我们提出了共振光电子能谱实验的Mo $_{1-x}$ Re $_{x}$合金组合物跨越两个电子拓扑跃迁（ETT）的临界浓度$x_{C1}$ = 0.05和$x_{C2}$ = 0.11的结果。光电子在合金的恒定初态（CIS）光谱中显示出额外的共振（$R3$）以及两个共振（$R1$和$R2$），这与在钼中观察到的共振相似。所有的共振都表现出Fano型的线形。合金的共振态$R1$和$R3$的不对称参数$q$很大且为负值。我们的分析表明，大的负q值的起源与声子辅助带间散射之间的类钼态和窄带，由于ETT出现。
英文摘要：
We present the results of resonant photoemission spectroscopy experiments on the Mo$_{1-x}$Re$_{x}$ alloy compositions spanning over two electronic topological transitions (ETT) at the critical concentrations $x_{C1}$ = 0.05 and $x_{C2}$ = 0.11. The photoelectrons show an additional resonance ($R3$) in the constant initial state (CIS) spectra of the alloys along with two resonances ($R1$ and $R2$) which are similar to those observed in molybdenum. All the resonances show Fano-like line shapes. The asymmetry parameter $q$ of the resonances $R1$ and $R3$ of the alloys is observed to be large and negative. Our analysis suggests that the origin of large negative q is associated with phonon assisted inter band scattering between the Mo-like states and the narrow band that appeared due to the ETT.
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