See also: A.M. Fridman, V.V. Prokof’eva, V.P. Tarashchuk
PACS: 96.30.Wr, 96.30.Qk, 96.30.Ys, 96.15.Uv, 97.10.Fy, 96.30.Mh, 96.25.St, 96.30.Pj