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SUMMARY:Quantum spin states in low dimensions and complex geometries
DTSTART:20091130T161500
DTSTAMP:20260505T075724Z
UID:c2d0bf6a1f7a5bff72a95c69553c3b05222dc3a0a2529e9887c95d1d
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr. Anuradha Jagannathan\nQuantum effects become important whe
 n the space dimensionality is decreased. I will discuss the ground states 
 of quantum spin models in two dimensions and for lattice configurations th
 at increase in complexity from the simple known Archimedean lattices to qu
 asiperiodic tilings such as the Penrose tiling. The consequences of geomet
 rical disorder on the spatial ordering and on the excitation spectrum will
  be discussed. Recent work on Kagome lattice antiferromagnets tends to sho
 w that magnetic frustration and large classical degeneracy can lead to a n
 ew type of disordered "spin liquid" phase. This possibility will be consid
 ered for the case of complex spin systems which may soon be possible to re
 alize via atomic deposition on surfaces of quasicrystals.
LOCATION:Auditoire CE4 - Centre Est
STATUS:CONFIRMED
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