image:  single slit diffraction

Sonoma State University
Department of Physics and Astronomy

New Professor to Join Department


Dr. Hongtao Shi will join the SSU Department of Physics and Astronomy as an assistant professor in the fall of 2004.

Dr. Shi is coming from the University of West Virginia, where he has been a postdoctoral researcher since earning his Ph.D. there in 2002.

One of Dr. Shi’s responsibilities at SSU will be to direct the William M. Keck Microanalysis Laboratory. He will be setting up a DC magnetron sputtering system, as well as supervising the use of the scanning electron microscope (SEM) and the atomic force microscope (AFM). He is also planning to make magnetic nanostructures with the addition of new software and hardware to the SEM. Students are encouraged to participate and contribute to these activities, gaining expertise in high vacuum systems and nanotechnology.

During the last few years, he has been working on thin magnetic films and semiconductors by ultrahigh vacuum molecular beam epitaxy, as well as DC magnetron sputtering, due to their applications in opto-electronics and information storage. He has been characterizing these samples with such tools as x-ray diffraction, scanning probe microscopes, and superconducting quantum interference device (SQUID) magnetometers. He was the first person to study the exchange coupling in NiF2, which is a weak ferromagnet.

He has authored and coauthored more than 30 papers in peer-reviewed journals. His research interests include self-assembly of quantum dots and antidots, nanostructures fabricated via scanning electron microscope, exchange coupling between a ferromagnet and an antiferromagnet, spin dependent tunneling and magnetic sensors, and wide band gap semiconductors.

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