论文标题
时间分辨的Arpes和Valence Band轨道性质的二分法
Dichroism in time-resolved ARPES and valence band orbital nature in BaNiS2
论文作者
论文摘要
时间分辨的ARPE可访问固体中激发电子状态的频带结构和超快速动力学。接近费米水平的轨道特征对于了解量子材料中几种外来现象的起源至关重要。通过执行依赖于极化的时间和角度分辨光发射光谱，并分析两个不同晶体方向的光电子产率的手性，我们确定了dirac semimetal banis2的化学潜力的轨道特性。我们的结果说明了对矩阵元素在时间分辨光发射光谱中影响的控制和理解如何成为研究量子材料的强大工具。
Time-resolved ARPES gives access to the band structure and ultrafast dynamics of excited electronic states in solids. The orbital character of the bands close to the Fermi level is essential to understand the origin of several exotic phenomena in quantum materials. By performing polarization dependent time- and angle-resolved photoemission spectroscopy and by analyzing the chirality of the photoelectron yield for two different crystal orientations, we identify the orbital character of bands below and above the chemical potential for the Dirac semimetal BaNiS2. Our results illustrate how the control and understanding of matrix elements effects in time-resolved photoemission spectroscopy can be a powerful tool for the study of quantum materials.
