论文标题
自旋液体候选者ybmggao $ _4 $的现场演变
Field evolution of the spin-liquid candidate YbMgGaO$_4$
论文作者
论文摘要
我们报告了三角形反铁磁铁ybmggao $ _4 $上的磁化强度，热容量，热膨胀和磁性测量测量值。我们的数据排除了在其他三角形抗铁磁铁中观察到的独特的$ \ frac13 $高原阶段的形成，但在自由能的第二个衍生物，磁易感性和特定热量的第二个衍生物中揭示了平稳性特征，$μ_0H$ = 1.0-2.5 t for $ = 1.0-2.5 t for $ h \ h \ parallel {} c $ {} c $ and {} c $ and 2-5 t for $ $ and} $ $ hh forp。使用对逼真的旋转哈密顿量的蒙特卡洛模拟，我们将这些功能归因于磁化化的非单调变化，而$ \ frac12 $高原通过在ybmggao $ _4 $中随机分布的交换耦合而被弄脏。
We report magnetization, heat capacity, thermal expansion, and magnetostriction measurements down to millikelvin temperatures on the triangular antiferromagnet YbMgGaO$_4$. Our data exclude the formation of the distinct $\frac13$ plateau phase observed in other triangular antiferromagnets, but reveal plateaulike features in second derivatives of the free energy, magnetic susceptibility and specific heat, at $μ_0H$ = 1.0 - 2.5 T for $H\parallel{}c$ and 2 - 5 T for $H\perp{}c$. Using Monte-Carlo simulations of a realistic spin Hamiltonian, we ascribe these features to nonmonotonic changes in the magnetization and the $\frac12$ plateau that is smeared out by the random distribution of exchange couplings in YbMgGaO$_4$.
