Accession Number:

AD0728645

Title:

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

Descriptive Note:

Corporate Author:

AEROSPACE RESEARCH LABS WRIGHT-PATTERSON AFB OHIO

Personal Author(s):

Report Date:

1971-05-01

Pagination or Media Count:

212.0

Abstract:

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 n 1.6 x 10 to the 18th powercc. The impurity conduction band and CdS conduction band are merged when a further increase in dopant extends the electron concentration to 1.6 x 10 to the 18th powercc n 2.4 x 10 to the 18th powercc. All samples with n 2.4 x 10 to the 18th powercc have essentially metallic properties. Author

Subject Categories:

  • Solid State Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE