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SUMMARY:Frustration and Correlations in Stacked Triangular Lattice Ising A
 ntiferromagnets - John Chalker (Theoretical Physics\, Oxford University)
DTSTART:20160610T101500Z
DTEND:20160610T111500Z
UID:TALK66500@talks.cam.ac.uk
CONTACT:Helen Verrechia
DESCRIPTION:I will discuss multilayer triangular lattice Ising antiferroma
 gnets with interlayer interactions that are weak and frustrated in an {\\i
 t abc} stacking. We show that they exhibit a classical spin liquid regime 
 at low temperature\, in which both intralayer and interlayer correlations 
 are strong but there is no long range order. Diffuse scattering in this re
 gime is concentrated on a helix in reciprocal space\, as observed for char
 ge-ordering in the materials LuFe$_2$O$_4$ and YbFe$_2$O$_4$.
LOCATION:TCM Seminar Room\, Cavendish Laboratory
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