Research Interests
My research interests include:
1) synthesis and analysis of novel nitride semiconductor surfaces, including transition metal nitrides
2) synthesis and analysis of magnetic and spintronic surfaces
3) utilization of spin-polarized scanning tunneling microscopy to reveal surface spin structure down to atomic scale
Material Synthesis and Analysis Techniques
In my laboratories, we synthesize new materials using molecular beam epitaxy.  The materials are analyzed using a combination of reflection high energy electron diffraction (RHEED) and scanning tunneling microscopy (STM). RHEED gives information about the evolving crystal surface as viewed in reciprocal space during synthesis; STM gives detailed views of the atomic-scale surface structure following synthesis. Using these techniques in tandem comprises a powerful approach to understanding the relationship between surface formation and resultant surface properties.
Spin-Polarized Scanning Tunneling Microscopy

I am particularly interested in the use of spin-polarized scanning tunneling microscopy (SP-STM) in studying the magnetic structure of surfaces down to the atomic scale.  In order to make full use of spectroscopic techniques such as SP-STM, my group has developed a second laboratory with a dedicated low-temperature SP-STM having a variable in-situ, applied magnetic field.  The facility is coupled to a custom, state-of-the-art materials synthesis facility for exploration of new material systems.
Laboratory Procedures