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29 March 2024
 
  » arxiv » cond-mat/9407007

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Incommensurate and Collinear Phases in a Doped Quantum Anti-ferromagnet
W. Barford ; S. Jadhav ;
Date 2 Jul 1994
Subject cond-mat
AffiliationUniversity of Sheffield
AbstractThe Schwinger Boson mean field theories of the `t-J’ model are extended by the consideration of anisotropic order parameters. This has two effects. First, a collinear phase, in which the spins are anti-ferromagnetically aligned in one direction and ferromagnetically aligned in the other, is found to be stable over a significant range of the phase diagram. Second, the (1,1) and (1,0) spiral phases become very close in energy. The inclusion of weak intra-sublattice coupling may therefore stabilise the (1,0) spiral with respect to the (1,1) spiral, thus harmonising theory and experiment.
Source arXiv, cond-mat/9407007
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