On the Violation of Marshall-Peierls Sign Rule in the Frustrated J 1 - J 2 Heisenberg Antiferromagnet
Authors:
- 1 March 1994
- journal article
- Published by IOP Publishing in Europhysics Letters
- Vol. 25 (7) , 545-550
Abstract
We present a number of arguments in favour of the suggestion that the Marshall-Peierls sign rule survives the frustration in the square-lattice Heisenberg antiferromagnet with frustrating next-nearest-neighbour (diagonal) bonds (J1-J2 model) for relatively large values of the parameter J2/J1. Both the spin-wave analysis and the exact-diagonalization data concerning the weight of Marshall states support the above suggestion.Keywords
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