Abstract
Extensive irradiations were carried on crystalline semiconductors InSb, GaAs and InAs. At low temperatures the frequency dependence of the conductivity is observed to be sublinear (σϖs). where s<1. The dependence of s on both the degree of the induced damage and on temperature is studied and discussed in terms of the quatum mechanical tunnelling and of correlated barrier hopping mechanisms.
At fairly low doses of irradiation activated conductance is observed with s having a weak temperature dependence. As the degree of damage is further increased conduction at helium temperatures takes place by variable range hopping, {ie433-1}. The constant b is observed to depend on the effective mass for different semiconductors.
At higher temperatures activated conduction is observed again. The observed activation energies E are Eg 1/4 l<E<Eg 1/2 and we believe they could represent hopping of single and double carriers.
Similar content being viewed by others
References
E.A. Davis and W. Compton Dale, Phys. Rev., A140, 2183, (1965).
R.E. Mckeighen and J.S. Koehler, Phys. Rev., B4, 462, (1971).
S.D. Kouimtzi, J.Phys.C: Solid St. Phys., 19, 2419, (1986), S.D. Kouimtzi Condens. Matter l, 1437, (1989), Phys. Stat. Sol., B153, 675, (1989).
M. Pollak and T.H. Geballe, Phys. Rev., 122 1742, (1961).
G.E. Pike, Phys. Rev., B6, 1572, (1972).
S.R. Elliott, Phil. Mag., 36, 1291, (1977), ibid S.R. Elliott, Phil.Mag. l37, 553, (1978).
S.D. Kouimtzi, Solid St. Commun., 65, 1435, (1988).
P.N. Butcher, Phil. Mag., B42, 799, (1980).
M. Grunewald, B. Polmann, D. Wurtz and B. Movaghar, J.Phys.C:Solid St.Phys. 16, 3739, (1983).
S. Summerfield and P.N. Butcher, J.Phys.C:Solid St.Phys., 15, 7003, (1982) ibid 16, 295, (1983) Phil.Mag., B49, (1984).
S.D. Kouimtzi, Proc.of the International Conf. on Science and Technology of Defect Control in Semiconductors, Yokohama 1989, In press.
K. Shimakawa, Phil.Mag., B46, 123, (1982).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Kouimtzi, S.D., J, J. Frequency Dependence of Hopping Conductance in Crystalline Electron Irradiated Semiconductors. MRS Online Proceedings Library 209, 433–438 (1990). https://doi.org/10.1557/PROC-209-433
Published:
Issue Date:
DOI: https://doi.org/10.1557/PROC-209-433