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SUMMARY:Visualization of Novel Electronic Structures in Topological Quantu
 m Matter - Yulin Chen\, Physics Department\, University of Oxford
DTSTART:20130130T111500Z
DTEND:20130130T121500Z
UID:TALK40842@talks.cam.ac.uk
CONTACT:Michael Sutherland
DESCRIPTION:The discovery of materials with novel properties is one of the
  most fascinating aspects of physics\, and such findings have always playe
 d important roles in the development of science and human life. A very rec
 ent example of conceptually new materials is the topological insulator. On
  the face of it\, these are well-known\, off-the-shelf materials\, but the
 y have previously overlooked properties which distinguish them from all ot
 her previously known quantum states. In its pure form\, a topological insu
 lator has a full energy gap in the bulk\; while on the surface\, it has ma
 ssless and gapless metallic states formed by an odd number of relativistic
  Dirac fermions with helical spin texture. Within the last few years\, top
 ological insulators have grown as one of the most intensely studied fields
  in condensed matter physics due to their scientific significance and tech
 nological potentials. \n\n    The rapid development of topological insulat
 ors has also inspired the study of many other novel topological quantum st
 ates\, such as quantum anomalous Hall states\, topological semi-metals\, a
 nd topological superconductors.\n\n    In this talk\, I will show that by 
 investigating these novel topological quantum materials with angle-resolve
 d photoemission spectroscopy (ARPES)\, we were able to directly visualize 
 their non-trivial electronic structures and unusual dynamics. In addition\
 , I will briefly discuss the application potentials of these unusual mater
 ials\, in electronics\, spintronics and energy-related applications.\n
LOCATION:TCM Seminar Room\, Cavendish Laboratory\, Department of Physics
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