Faradėjaus efekto tyrimai siauratarpiuose puslaidininkiuose: optinė alternatyva Holo matavimams

• Main Author: Clarke, Frederick Walter
• Other Authors: Laurinavičius, Albertas
• Format: Doctoral Thesis
• Language: Lithuanian
• Published: Lithuanian Academic Libraries Network (LABT) 2006
• Subjects: Physics; Efektinė masė; Narrow gap semiconductors; Faradėjaus efektas; Faraday rotation; Effective mass; Siauratarpiai puslaidininkiai
• Online Access: http://vddb.library.lt/fedora/get/LT-eLABa-0001:E.02~2006~D_20060512_152126-98689/DS.005.0.01.ETD

The main aim of this work was to develop a method of screening HgCdTe materials for carrier concentration and mobility using Faraday rotation θ and absorption α. Faraday rotation provides N/m*2, where N is the carrier concentration and m* is the effective mass. Since m* was not known in HgCdTe, a Faraday rotation spectrometer was developed to systematically measure it as a function of temperature and Cd mole fraction. Effective masses in n-InSb, and n-GaAs were measured and compared with known values in the literature to validate the method. Mobility is proportional to θ/α. The proportionalities were determined in HgCdTe, n-InSb, and n-GaAs at infrared wavelengths.