Physics and Astronomy Colloquium Series
Thursday, Dec. 4, 2014
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!
Oct. 2, 2014
Oct. 16, 2014
Oct. 30, 2014
Nov. 13, 2014
Dec. 4, 2014