. 2016 Aug 5;7:12375. doi: 10.1038/ncomms12375

Table 1. Parameters for the bulk dielectric function of Bi₂Se₃.

	w_pj	w_0j	γ_j
α	19.2	2.0	0.15
β	2.3	3.72	0.06
f	11.5	0	0.24

The values given are in THz and were measured at 6 K (ref. ²⁵). The α and β phonons are represented by Lorentz terms. The Drude term is due to free bulk charge carriers (f) and not surface electrons, which we treat quantum mechanically.

Table 1. Parameters for the bulk dielectric function of Bi2Se3.

Table 1. Parameters for the bulk dielectric function of Bi₂Se₃.