Condensed Matter and Statistical Physics Journal Club
| Date: | November 17 and November 24, 2008 |
| Title: |
Quasi long Range Order in Classical Antiferromagnets on the Kagome lattice |
| Speaker: |
Kabir Ramola |
| Reference: |
- "Long range spin order in the classical kagome antiferromagnet: effective Hamiltonian approach " by Christopher L. Henley [arXiv:cond-mat.str-el]
- "Classical antiferromagnets on the Kagomé lattice" by David A. Huse and
Andrew D. Rutenberg [Phys.Rev.B]
[from Rutenberg's site]
- "Hidden order in a frustrated system: Properties of the Heisenberg Kagomé antiferromagnet" by J. T. Chalker, P. C. W. Holdsworth, and E. F. Shender
[Phys.Rev.Lett.]
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| Abstract: |
The classical Heisenberg antiferromagnet on the Kagome lattice is a highly frustrated system. As T→0 , the free energy of the spin-mode fluctuations causes ordering into a coplanar state, in which all spins lie in the same plane of spin space pointing in just three directions (120° apart) [3]. It is argued that this state develops a long range order and the √3×√3 state is selected in the T→0 limit [1,2]. The talk is a presentation of the arguements developed in these papers.
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