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DESCRIPTION:Kiril Shtengel \, University of California\, Riverside\n\n
<
span style="color:black">The Heisenberg antiferromagnet on the kagome latt
ice is an archetypal example of how large ground state degeneracies arise\
, and how they may get resolved by thermal and quantum fluctuations. Augme
nting the Heisenberg model by \;chiral \;spin interactions has pro
ved to be of particular interest in the discovery of \;chiral \;qu
antum spin liquids. I will focus on the classical variant of this \;ch
iral \;kagome model\, which exhibits\, similar to the classical Heisen
berg antiferromagnet\, a remarkably large and structured ground-state mani
fold combining continuous and discrete degrees of freedom. This allows for
a rich set of order-by-disorder \;phenomena. Degeneracy lifting by th
ermal and quantum fluctuations occurs in a highly selective way that\, amo
ng other interesting effects\, provides a semiclassical route to an emerge
nt Z_2 spin liquid. \;
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DTSTART:20221201T203000Z
LOCATION:Monroe Hall\, Room 124
SUMMARY:Order by disorder in classical kagome antiferromagnets with chiral
interactions
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