Accession Number : AD0725165

Title :   High Electric Field Transport in the Lead Chalcogenides.

Descriptive Note : Technical rept.,

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE CENTER FOR SPACE RESEARCH

Personal Author(s) : St-Onge,Hugues

Report Date : APR 1971

Pagination or Media Count : 159

Abstract : Nanosecond pulse techniques were used to measure the velocity-field characteristics of bulk samples of n-type PbSe, PbTe and Pb(.83)Sn(.17)Te at 77K and 4.2K for carrier concentrations ranging from 1 x 10 to the 17th power/cc to 5 x 10 to the 17th power/cc. At fields of a few hundred volts/cm, strong deviations from ohmic conduction are observed, the velocity showing a clear tendency towards saturation. The theoretical analysis of the results shows that at high electric fields polar optical scattering is dominant in the Pb salts. The results obtained for electric fields above thethreshold for impact ionization are consistent with carrier generation if the Pinch effect is taken into account. (Author)

Descriptors :   (*SEMICONDUCTORS, ELECTRICAL CONDUCTIVITY), LEAD COMPOUNDS, SELENIDES, TELLURIDES, INDIUM ANTIMONIDES, ELECTRIC FIELDS, IONIZATION, CRYOGENICS

Subject Categories : Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE