# Cluster functional renormalization group and absence of a bilinear spin liquid in the J1−J2 Heisenberg model

@article{Roscher2019ClusterFR, title={Cluster functional renormalization group and absence of a bilinear spin liquid in the J1−J2 Heisenberg model}, author={Dietrich Dr. Roscher and Nico Gneist and Michael M Scherer and Simon Trebst and Sebastian Diehl}, journal={Physical Review B}, year={2019} }

The pseudofermion functional renormalization group (pf-FRG) has been put forward as a semi-analytical scheme that, for a given microscopic spin model, allows to discriminate whether the low-temperature states exhibit magnetic ordering or a tendency towards the formation of quantum spin liquids. However, the precise nature of the putative spin liquid ground state has remained hard to infer from the original (single-site) pf-FRG scheme. Here we introduce a cluster pf-FRG approach, which allows…

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