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SUMMARY:Current and future possibilities of spin-resolved ARPES on systems
  with large spin-orbit interaction
DTSTART:20131018T141500
DTSTAMP:20260510T082031Z
UID:c74188a311d9e70cc0df9e391fbeeda9e5d2f7d3cb0484112ddec22c
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Hugo Dil\, Institute of Condensed Matter Physics\, EPFL\
 nSpin- and angle-resolved photoemission spectroscopy (SARPES) is a powerfu
 l technique to determine all the observable quantum numbers of an electron
  in a solid[1\,2]. The possibilities and challenges of this technique will
  first be discussed by the example of Rashba systems. We have measured Ras
 hba-type spin splitting on the surfaces of metals\, semiconductors\, and r
 ecently also on the surface of an insulator. Also we could elucidate the c
 omplex spindle torus Fermi surface of systems without bulk inversion symme
 try.\nFurthermore the spin texture of topological insulators will be eluci
 dated and based on this it will be shown how SARPES can explore the subtle
  interplay between spin and orbital degrees of freedom. For example this r
 esults in a reversal of the measured spin polarization with light helicity
  on Bi2Se3. The origin of these and similar observations will be explained
  based on a final state interference model.\nThese observations pave a dir
 ect path to take SARPES to the next level\, where it will be possible to e
 xplore the phase of the wave function of correlated systems. Such and othe
 r future possibilities of SARPES will be discussed in an informal way and 
 is open to input from the audience.\nReferences:\n[1] J.H. Dil JPCM Review
  21\, 403001 (2009).\n[2] U. Heinzmann and J.H. Dil\, JPCM Review 24\, 173
 001 (2012).
LOCATION:PH L1 503 http://plan.epfl.ch/?room=PHL1503
STATUS:CONFIRMED
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