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Low-frequency Raman scattering in WSe2−MoSe2 heterobilayers: Evidence for atomic reconstruction

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Holler, Johannes ; Meier, Sebastian ; Kempf, Michael ; Nagler, Philipp ; Watanabe, Kenji ; Taniguchi, Takashi ; Korn, Tobias ; Schüller, Christian
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Date of publication of this fulltext: 21 Jul 2020 05:56


We investigate WSe2-MoSe2 heterobilayers with different twist angles theta +/- delta between the two layers by low-frequency Raman scattering. In sufficiently aligned samples with theta = 0 degrees or theta = 60 degrees and delta less than or similar to 3 degrees, we observe an interlayer shear mode (ISM), which is a clear sign of a commensurate bilayer structure, i.e., the layers must undergo an ...


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