See also: K.N. Boldyrev, M. Diab, V.I. Ozhogin, Yu.A. Izyumov
PACS: 71.70.-d, 78.20.Bh, 75.50.Ee, 78.40.Ha, 78.55.Hx, 78.90.+t, 63.20.kd, 75.85.+t, 78.30.-j, 07.62.+s