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Multimodal spectromicroscopy of monolayer WS2 enabled by ultra-clean van der Waals epitaxy, Kastl, C, Chen, C T, Koch, R J, Schuler, B, Kuykendall, T R, Bostwick, A, Jozwiak, C, Seyller, T, Rotenberg, E, Weber-Bargioni, A, Aloni, S, Schwartzberg, A M
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Kastl et al. (2018) studied this question.
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