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arXiv · 0810.5347

Algebraic spin liquid in an exactly solvable spin model

Hong Yao·Shou-Cheng Zhang·Steven A. Kivelson
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Abstract

We have proposed an exactly solvable quantum spin-3/2 model on a square lattice. Its ground state is a quantum spin liquid with a half integer spin per unit cell. The fermionic excitations are gapless with a linear dispersion, while the topological "vison" excitations are gapped. Moreover, the massless Dirac fermions are stable. Thus, this model is, to the best of our knowledge, the first exactly solvable model of half-integer spins whose ground state is an "algebraic spin liquid."

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Hong Yao, Shou-Cheng Zhang, Steven A. Kivelson. 2008-10-29. Algebraic spin liquid in an exactly solvable spin model. https://doi.org/10.1103/physrevlett.102.217202

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