EFFECTIVE LATTICE MODELS FOR TWO-DIMENSIONAL QUANTUM ANTIFERROMAGNETS
1990 ◽
Vol 04
(16)
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pp. 1043-1052
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Keyword(s):
We introduce a 2+1 dimensional lattice model, S0, of N complex scalars coupled to a compact U(1) gauge field as a description of quantum fluctuations in SU(N) antiferromagnets. Duality maps are used to obtain a single effective action for the Néel and spin-Peierls order parameters. We examine the phases of S0 as a function of N: the N→∞ limit can be deduced from previous work. At N=1, S0 describes monopoles and their Berry phases, spin-Peierls order, but not the Néel field: Monte-Carlo simulations show a second-order transition from a spin-Peierls phase to a Higgs phase which is the remnant of the Néel phase.
2014 ◽
Vol 140
(16)
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pp. 164708
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Keyword(s):
1999 ◽
Vol 83
(4)
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pp. 796-799
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2003 ◽
Vol 377
(5-6)
◽
pp. 551-556
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Keyword(s):
1989 ◽
Vol 22
(14)
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pp. L705-L709
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2004 ◽
Vol 30
(6)
◽
pp. 771-777
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2017 ◽
Vol 28
(08)
◽
pp. 1750099
2000 ◽
Vol 12
(10)
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pp. 2233-2243
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Keyword(s):