# 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} }

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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