Measuring valley polarization in two-dimensional materials with second-harmonic spectroscopy
ACS Photonics(2020)
摘要
A population imbalance at different valleys of an electronic system lowers its effective rotational symmetry. We introduce a technique to measure such imbalance — a valley polarization — that explo...
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关键词
second-harmonic generation,valley polarization,transition metal dichalcogenides,graphene,2D materials
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