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The First Tetrahedrally Bonded Diamond–Like Compounds with Metallic Conductivity

Published online by Cambridge University Press:  28 February 2011

Y. Sawan
Y. Sawan*
Affiliation:
Kuwait University, Chemistry Department, P.O. Box 5969, Kuwait.
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Abstract

In this paper we report for the first time the discovery of metallic conductivity in some tetrahedrally bonded diamond–like ternary oompounds 1 v vl with the general formula A3B C4 · Such compounds are characterized by a Valence Electron Concentration (VEC) of four valence electrons per atom. The preparation and characterization of one of the investigated compounds Cu3AsSe4 will be presented.

The transition metal atoms in such a compound are connected by non-transition metal atoms (Se) via coordinate locallized bonds in a tetrahedral environment. Such an environment should lead to a splitting in the 3d filled orbitals of the transition metal because of lattice field. A delocalization of the 3d electrons is expected to take place via back donation, through an overlap with the empty antibonding orbitals on the non-metal atoms to minimize the negative formal charge on the transition metal atoms. If such an overlap leads to continuous electron path through the whole material, metallic conductivity could be visualized. The detailed bonding model will be discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 49: Symposium F – Materials Issues in Applications of Amorphous Silicon Technology , 1985 , 231
Copyright
Copyright © Materials Research Society 1985

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References

[1] Myuller, R.L., Proceedings of the All-Unium Meeting on the Vitreous State; lzd. Akad Nauk. SSSR, Leningrad (1959) p. 63.Google Scholar
[2] Goryuonova, N.A., “Chemistry of Diamond-like Semiconductors”, lzd. LGU, (1963) p. 21.Google Scholar
[3] Huheey, J.E., “Inorganic Chemistry”, 3rd edition, Harper and Row, N.Y. (1983); a (p-590); b (pp.365–378).Google Scholar
[4] Liang, S.H., Bienenstock, A., and Bates, C.W., Phys.Rev.B, 10 (1974) 1528.CrossRefGoogle Scholar
[5] Hunter, S.H., Bienenstock, A., and Hayas, T.M., Proceedings of the Seventh Inter.Conf. on Amorphous and Liquid Semiconductors, Edinbury, U.K., ed. Spear, W. (1977). p.78.Google Scholar
[6] Mott, N.F., and Street, R.A., Phil. Mag. 36 (1977) p.33.CrossRefGoogle Scholar
[7] Pauling, L., “The Nature of the Chemical Bond”, 3rd ed., Cornell Univ. Press, Ithaca, N.Y., (1960), pp.172–174.Google Scholar
[8] Saito, Y., “Inorganic Molecular Dissymetry”, Springer-Verlag, Berlin (1979).CrossRefGoogle Scholar
[9] Sawan, Y., El-Gabaly, M., and Kollias, N., Physica, 1173 and 1188 (1983) p.995.Google Scholar
[10] Kastner, M., Adler, D., and Fritzsche, H., Phys.Rev.Lett. 37 (1976), p.1504.CrossRefGoogle Scholar