David Smith

Title: 
Regents’ Professor
A research image for phyadmin

My ongoing research centers around the development of quantitative high-resolution electron microscopy, aided by computer-controlled microscope operation and image simulation, which enables direct determination of atomic structure in defective materials. My research also involves using electron-microscopy-based methods to characterize advanced materials such as semiconductor heterostructures, magnetic thin films and multilayers, and nanostructures. Semiconductor systems of interest include ternary and quaternary Group III nitride alloys for light-emitting diodes, lasers, and high-electron mobilty transistors, and II-VI alloys such as mercury-cadmium telluride for detectors of infra-red radiation. Magnetic materials being studied include shape-memory alloys, as well as magnetic tunnel junctions, which are based on ferromagnet-insulator-ferromagnet combinations, that have promising applications for non-volatile, high-storage-density recording media. Off-axis electron holography is a particularly powerful approach since it permits quantitative visualization of nanoscale electric and magnetic fields, and we are using the technique to investigate the magnetization behavior and fringing fields associated with patterned nanostructures.

Home Dept: 
Arizona State University Department of Physics
Category: 
Faculty
Office Hours: 
Tuesday: 10:15 AM - 11:30 AM
Thursday: 10:15 AM - 11:30 AM
Degree Info: 
Ph.D., University of Melbourne
D.Sc. University of Melbourne
Area of Study: 
Electron Microscopy and Materials Physics
Office Room: 
PSB 343
Phone: 
(480) 965-4540

Selected Publications

D.J. Smith . 2008 . Development of aberration-corrected electron microscopy . Microsc. & Microanal . 14 . 2-15
D.J. Smith . 2008 . Ultimate resolution in the electron microscope . Materials Today . 11 (Supp.) . 30-38
D. J. Smith . 2008 . Progress and perspectives for atomic-resolution electron microscopy . Ultramicroscopy . 108 . 159-166