Spectroscopic Signatures of AA鈥?and AB Stacking of Chemical Vapor Deposited Bilayer MoS2

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• 作者：Ming Xia ; Bo Li ; Kuibo Yin ; Giovanni Capellini ; Gang Niu ; Yongji Gong ; Wu Zhou ; Pulickel M. Ajayan ; Ya-Hong Xie
• 刊名：ACS Nano
• 出版年：2015
• 出版时间：December 22, 2015
• 年：2015
• 卷：9
• 期：12
• 页码：12246-12254
• 全文大小：740K
• ISSN：1936-086X

文摘

Prominent resonance Raman and photoluminescence spectroscopic differences between AA鈥?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鈥?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.