CME Seminar - TODAY - Nuh Gedik, MIT - 11:30am, Smith Seminar Room (1080 PRB)

[Longbrake, Patricia]

Please join us TODAY for the CME Seminar presented by Nuh Gedik from the Massachusetts Institute of Technology (MIT) at 11:30am in the Smith Seminar Room (1080 PRB).

"Ultrafast Probing of Dirac Fermions in Topological Insulators"

The three-dimensional topological insulator (TI) is a new phase of matter that exhibits quantum-Hall-like properties, even in the absence of an external magnetic field.  In this talk, I will discuss recent experiments in which we used ultrafast laser pulses to directly visualize spin texture of topological surface electrons and their coupling to the bulk electrons. We find that an idealized helical spin texture only exists within a small energy window about the Dirac point. Our time resolved measurements indicate that coupling between surface and bulk electrons are mediated by phonons.

Thank you,
Trisch

[The Ohio State University]
Trisch Longbrake
Administrative Associate I
Department of Physics Condensed Matter
2196 Physics Research Building, 191 W. Woodruff Ave., Columbus, OH 43210
614-292-2778 Office / 614-292-7557 Fax
longbrake.6 at osu.edu<mailto:longbrake.6 at osu.edu> osu.edu<http://osu.edu/>

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osu.edu/pipermail/physics-other/attachments/20130502/0f7fbed9/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.png
Type: image/png
Size: 3605 bytes
Desc: image001.png
URL: <http://lists.osu.edu/pipermail/physics-other/attachments/20130502/0f7fbed9/attachment.png>