Exotic Electron Transport in Topological Insulator Thin Films

When: Wednesday, February 08, 2012 at 12:00 pm
Where: DA 114
Speaker: Badih Assaf
Organization: Northeastern University
Sponsor: Introduction to Physics Research

Topological insulators (TI) are an entirely new state of matter, characterized by an insulating bulk and metallic surfaces. Conduction on the surfaces is non-dissipative. This makes TIs very attractive for applications in electronic devices. Magneto-electric surface properties also allow TIs to host exotic particles such as Majorana Fermions or magnetic monopoles. A great amount of research is aimed at exploring the properties of surface electrons and attempting to discriminate between surface and bulk states. We are therefore investigating electron wavefunction interference effects in the magnetoresistance of magnetic and non-magnetic TIs as well as other transport phenomena such as the anomalous Hall Effect. Experiments are performed on MBE grown Bi2Te2Se thin films and show evidence of surface transport.