See also: E.G. Maksimov, D.Yu. Savrasov, V.L. Ginzburg
PACS: 63.20.Kr, 71.10.+x, 71.20.Cf, 71.38.+i, 63.20.Dj, 71.25.Cx, 71.25.Pi, 74.25.Gz, 79.60.-i, 74.72.-h