Algebraic spin liquid in an exactly solvable spin model

Details Algebraic spin liquid in an exactly solvable spin model Algebraic spin liquid in an exactly solvable spin model

2008-10-29

arxiv.org/abs/0810.5347v1

Phys. Rev. Lett. 102, 217202 (2009)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 1 figure

Scientific paper

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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