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- W1520853860 abstract "By using the variational Monte Carlo technique, we study the spin-1/2 XXZ antiferromagnetic model (with easy-plane anisotropy) on the kagome lattice. A class of Gutzwiller projected fermionic states, including a spin Jastrow factor, is considered to describe both spin liquids (with U(1) or Z2 symmetry) and magnetically ordered phases (with q = (0, 0) or q = (4π/3, 0)). We find that magnetic states are not stable in the thermodynamic limit. Moreover, there is no energy gain to break the gauge symmetry from U(1) to Z2 within the spin-liquid states, as previously found in the Heisenberg model. The best variational wave function is therefore the U(1) Dirac state, supplemented by the spin Jastrow factor. Finally, a vanishing S = 2 spin gap is obtained at the variational level, in the whole regime from the XY to the Heisenberg model." @default.
- W1520853860 created "2016-06-24" @default.
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- W1520853860 date "2015-05-23" @default.
- W1520853860 modified "2023-09-26" @default.
- W1520853860 title "Gapless spin liquid in the spin-$1/2$ XXZ antiferromagnetic model on the kagome lattice" @default.
- W1520853860 hasPublicationYear "2015" @default.
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