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Anomalously Strong 2D Band Intensity in Twisted Bilayer Graphene: Raman Evidence for Doubly Degenerate Dirac Band
Yanan Wang, Zhihua Su, Wei Wu +8
We report the observation of anomalously strong 2D band in twisted bilayer graphene (tBLG) with large rotation angles under 638-nm and 532-nm visible laser excitation. The 2D band…
Observation of Low Energy Raman Modes in Twisted Bilayer Graphene
Rui He, Ting-Fung Chung, Conor Delaney +7
Two new Raman modes below 100 cm^-1 are observed in twisted bilayer graphene grown by chemical vapor deposition. The two modes are observed in a small range of twisting angle at wh…
High mobility and high on/off ratio field-effect transistors based on chemical vapor deposited single-crystal MoS2 grains
Wei Wu, Debtanu De, Su-Chi Chang +4
We report field-effect transistors (FETs) with single-crystal molybdenum disulfide (MoS2) channels synthesized by chemical vapor deposition (CVD). For a bilayer MoS2 FET, the mobil…
Twisted Bilayer Graphene Superlattices
Yanan Wang, Zhihua Su, Wei Wu +14
Twisted bilayer graphene (tBLG) provides us with a large rotational freedom to explore new physics and novel device applications, but many of its basic properties remain unresolved…