# Gapless spin-liquid phase in the kagome spin-(1)/(2) Heisenberg antiferromagnet

@article{Iqbal2013GaplessSP,
title={Gapless spin-liquid phase in the kagome spin-(1)/(2) Heisenberg antiferromagnet},
author={Yasir Iqbal and Federico Becca and Sandro Sorella and Didier Poilblanc},
journal={Physical Review B},
year={2013},
volume={87},
pages={060405}
}
• Published 9 September 2012
• Physics
• Physical Review B
We study the energy and the static spin structure factor of the ground state of the spin-1/2 quantum Heisenberg antiferromagnetic model on the kagome lattice. By the iterative application of a few Lanczos steps on accurate projected fermionic wave functions and the Green's function Monte Carlo technique, we find that a gapless (algebraic) U(1) Dirac spin liquid is competitive with previously proposed gapped (topological) Z2 spin liquids. By performing a finite-size extrapolation of the ground…
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