Yu Zhang

© 2016 IOP Publishing Ltd.Few-layer thick MoSe2 and WSe2 possess non-trivial spin textures with sizable spin splitting due to the inversion symmetry breaking embedded in the crystal structure and strong spin-orbit coupling. We report a spin-resolved photoemission study of MoSe2 and WSe2 thin film samples epitaxially grown on a bilayer graphene substrate. We only found spin polarization in the single-and trilayer samples-not in the bilayer sample-mostly along the out-of-plane direction of the sample surface. The measured spin polarization is found to be strongly dependent on the light polarization as well as the measurement geometry, which reveals intricate coupling between the spin and orbital degrees of freedom in this class of material.

Supporters of the Evaluative Judgment Theories of Emotion mainly explore emotions from the perspective of cognitive evaluation and advocate that emotions are evaluative judgments. The Perceptual Theories of Emotion have made some modifications to the evaluative judgment of emotions, attempting to propose better theories. The Perceptual Theories of Emotion advocate verifying the similarities between emotions and perceptions through analogical reasoning. However, the Perceptual Theories of Emotion also have their problems. Compared to the Evaluative Judgment Theories of Emotion and the Perceptual Theories of Emotion, the Embodied Emotion Theory has significant advantages, mainly reflected in avoiding the drawbacks of over-intellectualize emotions by evaluative judgments; infants and animals can also understand emotions through non-conceptualized ways of self-awareness and understanding of social rules and norms; the core relational property of emotions revealed in the embodied emotion theory demonstrates the action orientation of emotions, connects the organism’s body and external environment, and integrates both biological and social aspects, further clarifying the complexity and diversity of emotions.