Universal Magnetic Properties of Frustrated Quantum Antiferromagnets in Two Dimensions

Abstract

We present a theory of frustrated, two-dimensional, quantum antiferromagnets in the vicinity of a quantum transition from a non-collinear, magnetically-ordered ground state to a quantum-disordered phase. Using a sigma-model for bosonic, spin-1/2, spinon fields, we obtain universal scaling forms for a variety of observables. Our results are compared with numerical data on the spin-1/2 triangular antiferromagnet.

12 pages, REVTEX 3.0, Yale University preprint

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• Universal quantum critical dynamics of two-dimensional antiferromagnets
• Large N expansion for frustrated and doped quantum antiferromagnets
• Universal Magnetic Properties of $L{a}_{2-\delta }S{r}_{\delta }Cu{O}_4$ at Intermediate Temperatures
• Possible Quantum Spin Liquid States on the Triangular and Kagome Lattices

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