Spectroscopic Signatures of AA' and AB Stacking of Chemical Vapor Deposited Bilayer MoS2.
Spectroscopic Signatures of AA' and AB Stacking of Chemical Vapor Deposited Bilayer MoS2.
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DOI：
10.1021/acsnano.5b05474
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发表时间：
2015-11
期刊：
影响因子：
17.1
通讯作者：
Ming Xia;Bo Li;K. Yin;G. Capellini;Gang Niu;Y. Gong;Wu Zhou;P. Ajayan;Yahong Xie
中科院分区：
文献类型：
--
作者：
Ming Xia;Bo Li;K. Yin;G. Capellini;Gang Niu;Y. Gong;Wu Zhou;P. Ajayan;Yahong Xie
报道了化学气相沉积法生长的AA'和AB双层二硫化钼（MoS2）在共振拉曼光谱和光致发光光谱上的显著差异。在相同的生长条件下，得到了由两种堆叠顺序组成的双层二硫化钼岛。在强等离激元共振作用下，在金纳米锥体表面获得了AA'和AB双层MoS2的共振拉曼光谱和光致发光光谱。共振拉曼光谱和光致发光光谱都显示出明显的特征，表明这两相之间的层间相互作用有明显的差异。这些发现对基于自旋和谷自由度的器件应用的意义将被讨论。
Prominent resonance Raman and photoluminescence spectroscopic differences between AA' and AB stacked bilayer molybdenum disulfide (MoS2) grown by chemical vapor deposition are reported. Bilayer MoS2 islands consisting of the two stacking orders were obtained under identical growth conditions. Resonance Raman and photoluminescence spectra of AA' and AB stacked bilayer MoS2 were obtained on Au nanopyramid surfaces under strong plasmon resonance. Both resonance Raman and photoluminescence spectra show distinct features indicating clear differences in interlayer interaction between these two phases. The implication of these findings on device applications based on spin and valley degrees of freedom will be discussed.