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VOLUME 52 | ISSUE 9 | PAGE 505
Nematic state in an exchange Heisenberg Hamiltonian
A qualitative case is made for the possibility of a spin-nematic state in a system of quantum-mechanical spins with a binary exchange interaction causing a frustration. The arguments are based on a possible instability of the spin-wave spectrum in the Neel state with respect to the formation of pairs of quasiparticles.




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