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Disorder-Induced Mimicry of a Spin Liquid in YbMgGaO4

  • Author(s): Zhu, Z
  • Maksimov, PA
  • White, SR
  • Chernyshev, AL
  • et al.
Abstract

© 2017 American Physical Society. We suggest that a randomization of the pseudodipolar interaction in the spin-orbit-generated low-energy Hamiltonian of YbMgGaO4 due to an inhomogeneous charge environment from a natural mixing of Mg2+ and Ga3+ can give rise to orientational spin disorder and mimic a spin-liquid-like state. In the absence of such quenched disorder, 1/S and density matrix renormalization group calculations both show robust ordered states for the physically relevant phases of the model. Our scenario is consistent with the available experimental data, and further experiments are proposed to support it.

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