论文标题
范德华异质结构中的摩尔限制激子的独特G因子
Distinctive g-factor of moire-confined excitons in van der Waals heterostructures
论文作者
论文摘要
我们通过实验研究了山谷Zeeman在光致发光（PL）光谱（PL）光谱中的山谷Zeeman分裂的高质量HBN/WS2/MOSE2/MOSE2/MOSE2/HBN异质结构在垂直于20 t的垂直磁场下接近零扭角处的近零角度。远低于其他范德华（VDW）异质结构中最近报道的层中激子的值。我们提供的证据表明，这种可见的G因子源于激发子在Moire模式所产生的潜在景观中的空间限制，因此Tolattice不匹配和/或杂波层中的层间扭曲。这使Magneto-PL成为一个重要的工具，可以更深入地了解Moire模式对VDW异质结构中激素限制的影响。
We investigated experimentally the valley Zeeman splitting of excitonic peaks in the photoluminescence (PL) spectra of high-quality hBN/WS2/MoSe2/hBN heterostructures at near-zero twist angles under perpendicular magnetic fields up to 20 T. We identify two neutral exciton peaks in the PL spectra: the lower energy one exhibits a reduced g-factor relative to that of the higher energy peak, and much lower than the recently reported values for interlayer excitons in other van der Waals (vdW) heterostructures. We provide evidence that such a discernible g-factor stems from the spatial confinement of the exciton in the potential landscape created by the moire pattern, due tolattice mismatch and/or inter-layer twist in heterobilayers. This renders magneto-PL an important tool to reach deeper understanding of the effect of moire patterns on excitonic confinement in vdW heterostructures.
