An Investigation of the Semiconductor-to-Metal Transition in Chlorine Doped Cadmium Sulfide Using Nuclear Magnetic Resonance

摘要

Spin-lattice relaxation times and Knight shifts were measured for Cd113 nuclei in twelve CdS crystals doped with various amounts of chlorine. Hall constants were also measured to obtain the conduction electron concentrations. Data were obtained on all samples at 300K and for some heavily doped samples at 77K, 4.2K and 2.13K. It was found that with increased doping, an impurity conduction band is formed in an electron concentration range (5. x 10 to the 17th power 2.4 x 10 to the 18th power/cc have essentially metallic properties. (Author)