Disordered and Ordered States in a Frustrated Anisotropic Heisenberg Hamiltonian

Details Disordered and Ordered States in a Frustrated Anisotropic Heisenberg Hamiltonian Disordered and Ordered States in a Frustrated Anisotropic Heisenberg Hamiltonian

2004-03-15

arxiv.org/abs/cond-mat/0403372v1

Physics

Condensed Matter

Strongly Correlated Electrons

Scientific paper

We use a recently proposed perturbative numerical renormalization group algorithm to investigate ground-state properties of a frustrated three dimensional Heisenberg model on an anisotropic lattice. We analyze the ground state energy, the finite size spin gap and the static magnetic structure factor. We find in two dimensions a frustration-induced gapless spin liquid state which separates two magnetically ordered phases. In the spin liquid state, the magnetic structure factor shows evidence that this state is made of nearly disconnected chains. This spin liquid state is unstable against unfrustrated interplane couplings.

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