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. 2016 Jun 27;7:12014. doi: 10.1038/ncomms12014

Figure 4. Bi2Se3 thickness dependence.

Figure 4

(a) MSHG parameters were measured from samples of various Bi2Se3 thicknesses (1–10 QL). EuS thickness is fixed at 5 nm. Both (b) C(M)/A2 and (c) C(M)/A show a decreasing behaviour, possibly due to the increased bulk contributions and SHG absorption from thicker Bi2Se3 films. (d) Out-of-plane response φ(M) for different Bi2Se3 thicknesses. In bd error bars represent the uncertainties of least square fitting of data to the theoretical model.