Physics and Astronomy Colloquium Series

Next Seminar

 Thursday, Dec. 4, 2014

David Nisson
UC  Davis

"Topological Insulators:  the next generation of materials"

Topological insulators are a new class of materials that insulate against electrical current in their bulk but conduct electricity on all surfaces.  The surfaces conduct electrical current in a special way that makes them potentially useful for applications in building "spintronic" devices that perform the tasks of today's electronics using less energy.  We have studied the microscopic interactions between the electrons and nuclei in the material Bi2Se3, which exhibits the special topological surface states, using nuclear magnetic resonance (NMR).  The tiny magnetic moments of the Bi 209 nuclei interact with the local spin and charge environment, and provide detailed information about the basic physics of these novel materials.  We have compared large bulk crystals with nanometer-sized wires, and find intriguing evidence that hints at the presence of the surface currents.

The Physics and Astronomy Colloquium Series is open to all members of the university. Unless otherwise noted, talks are held on Thursday afternoons at 4:00-5:20 in Mendocino 1015. Schedule is regularly updated as dates, titles, and abstracts are received. Please check back often. To receive updates about the Colloquium Series, please join our Events Mailing List. For past semesters' series, see our archive.

Fall 2014 Semester Schedule

We will update the schedule for the Fall 2014 semester as we get closer to the start of the semester. Have a great summer!

Sept. 11, 2014
Prof. Galen Pickett
CSU Long Beach
"Social Physics at CSU Long Beach"

Sept. 25, 2014
Dr. Eliza Morris
Harvard University
The Cytoskeleton and Polymer Model Systems"

Oct. 2, 2014
Dr. Mikkel Jensen
Harvard University
“Measuring Intracellular Mechanics with Laser Tweezers”

Oct. 16, 2014  
Dr. Michael Foss-Feig
University of Maryland / NIST
"Ultracold Atoms Far From Equilibrium"

Oct. 30, 2014
Prof. Douglas Osheroff
Stanford University

"How Science Changes Our Lives"
Nov. 6, 2014
Dr. Timothy E. Eastman
NASA Goddard
"The Plasma Universe: Gravity Plus Electromagnetism"

Nov. 13, 2014
Dr. Kyle Watters
Sac State University
"Neutron Stars: Indisputably the Most Interesting Objects in the Universe"

Dec. 4, 2014
David Nisson
UC Davis
 "Topological Insulators: the next generation of materials"