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Spinons, triplons, and ordering in quasi-one-dimensional antiferromagnets
  KTH/Nordita/SU seminar in Theoretical Physics [before December 2013]

Wednesday 05 September 2007
from 11:00 to 12:00
at FA31
Speaker : L. Balents (UCSB)
Abstract : One dimensional spin chains have been a subject of theoretical study for *many* decades. A remarkable feature of such chains is the existence of "spinons", neutral spin-1/2 excitations which "fractionalize" the naively elementary spin-flip. Experiments on the material Cs2CuCl4 have shown a remarkable similarity of the excitation spectrum to that of one dimensional spin chains, despite quite large inter-chain exchange (approximately 1/3 of the intra-chain exchange). I will discuss the theory of these experiments, and of the low temperature ordering in such systems.

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