Spinons in a Crossed-Chains Model of a 2D Spin Liquid

Abstract

Using Random Phase Approximation, we show that a crossed-chains model of a spin-1/2 Heisenberg spins, with frustrated interchain couplings, has a non-dimerized spin-liquid ground state in 2D, with deconfined spinons as the elementary excitations. The results are confirmed by a bosonization study, which shows that the system is an example of a `sliding Luttinger liquid'. In an external field, the system develops an incommensurate field-induced long range order with a finite transition temperature.

4 pages, 3 figures; added references; scaling analysis, preserving spin rotational invariance, is extended to finite temperature

References in corpus (4)

• Sliding Luttinger liquid phases
• Finite-temperature dynamical magnetic susceptibility of quasi-one-dimensional frustrated spin-1/2 Heisenberg antiferromagnets
• Quantum disorder in the two-dimensional pyrochlore Heisenberg antiferromagnet
• NMR relaxation rates in spin-1/2 antiferromagnetic chains

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