Muon Spin Relaxation Evidence for the U(1) Quantum Spin-Liquid Ground State in the Triangular Antiferromagnet YbMgGaO_{4}.

@article{Li2016MuonSR,
  title={Muon Spin Relaxation Evidence for the U(1) Quantum Spin-Liquid Ground State in the Triangular Antiferromagnet YbMgGaO_\{4\}.},
  author={Yuesheng Li and Devashibhai T Adroja and Pabitra K Biswas and Peter J Baker and Qian Zhang and Juanjuan Liu and Alexander A. Tsirlin and Philipp Gegenwart and Qingming Zhang},
  journal={Physical review letters},
  year={2016},
  volume={117 9},
  pages={097201}
}
Muon spin relaxation (μSR) experiments on single crystals of the structurally perfect triangular antiferromagnet YbMgGaO_{4} indicate the absence of both static long-range magnetic order and spin freezing down to 0.048 K in a zero field. Below 0.4 K, the μ^{+} spin relaxation rates, which are proportional to the dynamic correlation function of the Yb^{3+} spins, exhibit temperature-independent plateaus. All these μSR results unequivocally support the formation of a gapless U(1) quantum spin… CONTINUE READING