Study of dielectric relaxation and AC conductivity of InP:S single crystal M.M. El-Nahass, H.A.M. Ali and E.A. El-Shazly Eur. Phys. J. Appl. Phys., 58 3 (2012) 30102 Published online: 05 July 2012 DOI: 10.1051/epjap/2012120094