IQIM Postdoctoral and Graduate Student Seminar

Friday August 7, 2015 4:00 PM

Broken-symmetry states in topological insulators

Speaker: Yihua Wang, Moler Group, Stanford University
Location: West Bridge 351 (LIGO Science Conference Room)

Abstract: Breaking the time-reversal symmetry (TRS) on the surface of a three-dimensional topological insulator (TI) transforms its metallic surface into a Chern insulator. The TRS-broken surface states are essential for many exotic emergent particles in condensed matter. In this talk, I will show broken TRS surface states of TI induced by magnetism and by light imaged with scanning superconducting quantum interference device (SQUID) and photoemission spectroscopy respectively. Our capability to manipulate mesoscopic magnetic structures as well as to shape ultrafast light pulses makes broken-symmetry states in TI promising platforms to simulate elusive fundamental particles such as magnetic monopoles and Majorana fermions.

Please note the location - this week's seminar will be in 351 W. Bridge


 

 

Series IQIM Postdoctoral and Graduate Student Seminar Series

Contact: Marcia Brown at 626-395-4013 marciab@caltech.edu