Spin $1/2$ Heisenberg antiferromanget on kagome: Z$_2$ spin liquid with fermionic spinons

ORAL

Abstract

Motivated by recent numerical and experimental studies of spin $1/2$ Heisenberg antiferromagnet on kagome, we formulate a many-body model for the fermionic spinons introduced in Phys. Rev. Lett. 103, 187203. The spinons experience strong onsite attraction. They also couple with a compact U$(1)$ gauge field. The ground state of the model is generically a Z$_2$ liquid. We calculate the edge of the two-spinon continuum, which can be measured in numerics and inelastic neutron scattering experiments.

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Authors

  • Zhihao Hao

    Department of Physics and Astronomy, University of Waterloo, Waterloo, ON

  • Oleg Tchernyshyov

    Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD