论文标题
在光电子角度分布中揭示隐藏的轨道伪质纹理，并具有时间反转二色性
Revealing Hidden Orbital Pseudospin Texture with Time-Reversal Dichroism in Photoelectron Angular Distributions
论文作者
论文摘要
我们对通过时间逆转对称性相互链接的不同晶体取向进行了散装2H-WSE $ _2 $的角度分辨光发射光谱（ARPE）。我们引入了一种新的可观察到的可观察到的称为时间反转二色性（TRDAD）中的时间反转二科，，该分布在有效的时间逆转操作时量化了光发射强度的调节。我们证明，由于光发射中的多个轨道干扰效应，隐藏的轨道假柔性纹理将其烙印留在了TRDAD上。我们的实验结果与使用光发射的一步模型进行的紧密结合模型和最新的相对论计算都具有定量一致性。虽然自旋分辨的ARPE探测了多功能系统中纠缠旋转轨道纹理的旋转成分，但我们明确地证明了TRDAD揭示其轨道假蛋白纹理的纹理。
We performed angle-resolved photoemission spectroscopy (ARPES) of bulk 2H-WSe$_2$ for different crystal orientations linked to each other by time-reversal symmetry. We introduce a new observable called time-reversal dichroism in photoelectron angular distributions (TRDAD), which quantifies the modulation of the photoemission intensity upon effective time-reversal operation. We demonstrate that the hidden orbital pseudospin texture leaves its imprint onto TRDAD, due to multiple orbitals interference effects in photoemission. Our experimental results are in quantitative agreement with both tight-binding model and state-of-the-art fully relativistic calculations performed using the one-step model of photoemission. While spin-resolved ARPES probes the spin component of entangled spin-orbital texture in multiorbital systems, we unambiguously demonstrate that TRDAD reveals its orbital pseudospin texture counterpart.
