Possible ferro-spin nematic order in NiGa2S4

Details Possible ferro-spin nematic order in NiGa2S4 Possible ferro-spin nematic order in NiGa2S4

2006-05-10

arxiv.org/abs/cond-mat/0605277v1

Physics

Condensed Matter

Strongly Correlated Electrons

Scientific paper

10.1103/PhysRevB.74.092406

We explore the possibility that the spin-1 triangular lattice magnet NiGa2 S4 may have a ferro-nematic ground state with no frozen magnetic moment but a uniform quadrupole moment. Such a state may be stabilized by biquadratic spin interactions. We describe the physical properties of this state and suggest experiments to help verify this proposal. We also contrast this state with a `non-collinear' nematic state proposed earlier by Tsunetsugu and Arikawa for NiGa2S4 .

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