Speaker: Ken Burch, Los Alamos
Date & Time: March 29, 2007 - 1:30pm
Location: Serin Room 385E
Investigation the Interplay Between Magnetism, Band Structure, and Lattice Dynamics with Optics
Physics and Astronomy
Ken Burch, Los Alamos
1:30pm, Serin Room 385E
Abstract: For over two millennia, scientists and philosophers have been investigating the origins of magnetism. This search has led to numerous discoveries and technological advances. Today magnetism plays a central role in many topics in condensed matter physics. In this talk I will discuss our recent attempts to understand how materials are effected by the inclusion of magnetic ions in the lattice. I will first focus on GaMnAs, a diluted magnetic semiconductor. Our optical experiments have revealed a number of interesting connections between the band structure and the magnetic properties of this prototypical spintronic compound. I will then explore our recent ultrafast measurements.