Table 1.

Average coordination number for different pairs of atoms computed from the partial pair correlation functions for the amorphous slab confined by the capping layers, compared with the data of a bulk amorphous model at the density of crystalline $\alpha$-GeTe (see text).

	Bulk GeTe	GeTe/TiTe2
Ge
with Ge	0.994	0.991
with Te	3.599	3.331
Total	4.543	4.322
Te
with Ge	3.599	3.331
with Te	0.038	0.057
Total	3.637	3.388