Transport and optical properties of n-cadmium-selenide.
Item
-
Title
-
Transport and optical properties of n-cadmium-selenide.
-
Identifier
-
AAI8914770
-
identifier
-
8914770
-
Creator
-
Levy, Miguel.
-
Contributor
-
Adviser: Myriam Sarachik
-
Date
-
1988
-
Language
-
English
-
Publisher
-
City University of New York.
-
Subject
-
Physics, Condensed Matter
-
Abstract
-
Transport measurements were performed on n-type CdSe near the metal-insulator transition above and below 4.2 K. The determination of compensation on the basis of transport data above 50 K is discussed. Use is made of some recent treatments of electron screening.;The resistivity of three insulating samples with carrier concentrations between 0.73 and 0.80 of the critical concentration follow a temperature dependence consistent with Mott variable range hopping in the temperature range between 1.25 K and 4.2 K. The Hall coefficient is also consistent with R{dollar}\sb{lcub}\rm H{rcub}{dollar} {dollar}\sim{dollar} exp {dollar}\rm\lbrack T\sb{lcub}oH{rcub}/T\rbrack\sp{lcub}1/4{rcub}{dollar} in that range. We compare our results with available theory and with those of other workers and point out some discrepancies.;Luminescence and Excitation spectra of metallic n-type CdSe were also obtained. We compare our results with available theory and find some discrepancies, which leads us to introduce some modifications into the theory. In particular, we consider the effect of compensation on band gap renormalization. We also look for and find evidence of acceptor states in the luminescence spectra.
-
Type
-
dissertation
-
Source
-
PQT Legacy CUNY.xlsx
-
degree
-
Ph.D.
