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SUMMARY:The importance of spin-orbit coupling to the electronic structure
DTSTART:20110301T140000
DTSTAMP:20260928T185944Z
UID:278a25c892867bcbe8418e5af4649ceeac8386c749400bc4c603a85c
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Andrea Damascelli\, University of British Columbia\, Van
 couver\, CA.\nThe Fermi surface of Sr2RuO4 was studied by a wide variety o
 f probes\, establishing this material as the first complex oxide for which
  the de Haas-van Alphen bulk transport technique and surface-sensitive ang
 leresolved photoemission spectroscopy (ARPES) have arrived at a precise qu
 antitative agreement. This result resolved was obtained by exploiting temp
 erature as an empirical cleaving parameter in suppressing the photoemissio
 n intensity associated with the reconstructed surface of the material. On 
 the basis of STM experiments\, we have been able to show that this is a co
 nsequence of a temperature-dependent increase in the surface density of de
 fects at the mesoscopic scale\, and might be used as an effective mean to 
 gain bulk-representative information by ARPES on unstable oxide surfaces. 
 By comparing these bulk ARPES results to first-principle calculations\, we
  provide evidence for the importance of spin-orbit coupling effects. Subtl
 e Fermi surface modifications are observed whenever the bands are nearly d
 egenerate\; most importantly\, however\, spin-orbit coupling induces a str
 ong momentum dependence\, normal to the RuO2 planes\, for both orbital and
  spin character. These findings have profound implications for the underst
 anding of unconventional superconductivity in Sr2RuO4.
LOCATION:CH G1 495 https://plan.epfl.ch/?room==CH%20G1%20495
STATUS:CONFIRMED
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