Title page for ETD etd-09102010-175624


Type of Document Dissertation
Author Frazier, Matthew Allen
URN etd-09102010-175624
Title Probe of Coherent and Quantum States in Narrow-Gap Based Semiconductors in the Presence of Strong Spin-Orbit Coupling
Degree PhD
Department Physics
Advisory Committee
Advisor Name Title
Khodaparast, Giti A. Committee Chair
Heflin, James R. Committee Member
Heremans, Jean J. Committee Member
Kulkarni, Rahul V. Committee Member
Keywords
  • Circular photo-galvanic effect
  • Magneto-optical Kerr effect
  • Spin polarized current
  • Narrow gap semiconductors
Date of Defense 2010-09-03
Availability unrestricted
Abstract
The goal of this project was to study some unexplored optical and magneto-optical properties

of the newest member of III-V ferromagnetic structures, InMnSb, as well as InSb films

and InSb/AlInSb quantum wells. The emphasis was on dynamical aspects such as charge

and spin dynamics in order to address several important issues of the spin-related phenomena.

The objectives in this project were to: 1) understand charge/spin dynamics in NGS

with different confinement potentials, 2) study phenomena such as interband photo-galvanic

effects, in order to generate spin polarized current, 3) probe the effect of magnetic impurities

on the spin/charge dynamics. This thesis describes three experiments: detection and

measurement of spin polarized photocurrents in InSb films and quantum wells arising from

the circular photogalvanic effect, and measurements of the carrier and spin relaxation in

InSb and InMnSb structures by magneto-optical Kerr effect and differential transmission.

The samples for our studies have been provided by Prof. Heremans at Virginia Tech, Prof.

Santos at the University of Oklahoma, and Prof. Furdyna at the University of Notre Dame.

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