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SUMMARY:Topological Surface States - Tunnelling and Patterning - Ankita An
 irban\, Cavendish Laboratory University of Cambridge
DTSTART:20171018T131500Z
DTEND:20171018T140000Z
UID:TALK94000@talks.cam.ac.uk
CONTACT:Dr Joanna Waldie
DESCRIPTION:Topological insulators (TIs) and their protected spin-momentum
  locked surface states (TSSs) have generated a great deal of interest with
 in the field in the last few years. Since the discovery of Bi2Se3 as a TI 
 with a Dirac cone at the surface\, many questions have arisen about furthe
 r understanding the properties of these states. \n\nThis project asks two 
 questions: how do surface states tunnel and how can they be patterned?    
 \n\nWe aim to use momentum-resolved tunnelling spectroscopy to map out the
  dispersion relation of the TSS\, and to measure whether spin is preserved
  during the tunnelling process. We also investigate ways to pattern the TS
 S: this is protected with time-reversal symmetry\, so using the magnetic p
 roximity effect to break the TSS in selected regions seems to be a promisi
 ng approach. \n\nI will outline the theory and principles behind these que
 stions and the research plan we have devised to tackle this and present ou
 r preliminary results.
LOCATION:Mott Seminar Room (Mott Building Room 531)\, Cavendish Laboratory
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