论文标题
$ j _ {\ rm eff} = 1/2 $三角晶格抗Fiferromagnet ybbo ybbo $ _3 $，缺乏磁性顺序和非常规波动的出现
Absence of magnetic order and emergence of unconventional fluctuations in $J_{\rm eff} =1/2$ triangular lattice antiferromagnet YbBO$_3$
论文作者
论文摘要
我们介绍了一种新的量子抗fiferromagnet ybbo $ _3 $的基态性能，其中各向同性Yb $^{3+} $三角形层被部分占据的B和O（2）位点的非磁性层隔开。磁化和热容量数据建立了一个旋转摩托车的有效自旋$ j _ {\ rm eff} = 1/2 $ yb $^{3+} $ ions的状态在低温下，与抗fiferromagnet与内部内部的抗fiferromagnet进行交互$ 1/3 $的尾巴在零场哑光不对称中排除了磁性长距离订购的发作，并将旋转旋转至20 〜MK。温度依赖的热容量的异常最大最大值，其零景哑光去极化速率的异常最大为$ t^*\ simeq 0.7 \ frac {j} {k _ {\ rm b}} $，以较大的速度（$ 0.182）提供了令人信服的证据（$ t^*\ frac {j _ {\ rm b}} $放松。我们推断出波动的状态是高度沮丧的三角形晶格抗铁磁铁的普遍特征，而没有磁性长阶的，这是由于受非磁性部位障碍保护的自旋晶格的完美二维性。
We present the ground state properties of a new quantum antiferromagnet YbBO$_3$ in which the isotropic Yb$^{3+}$ triangular layers are separated by a non-magnetic layer of partially occupied B and O(2) sites. The magnetization and heat capacity data establish a spin-orbit entangled effective spin $J_{\rm eff} = 1/2$ state of Yb$^{3+}$ ions at low temperatures, interacting antiferromagnetically with an intra-layer coupling $J/k_{\rm B} \simeq 0.53$ K. The absence of oscillations and a $1/3$ tail in the zero-field muon asymmetries rule out the onset of magnetic long-range-order as well as spin-freezing down to 20~mK. An anomalous broad maximum in the temperature dependent heat capacity with a unusually reduced value and a broad anomaly in zero-field muon depolarization rate centered at $T^*\simeq 0.7 \frac{J}{k_{\rm B}}$ provide compelling evidence for a wide fluctuating regime ($0.182 \leq T/J \leq 1.63$) with slow relaxation. We infer that the fluctuating regime is a universal feature of a highly frustrated triangular lattice antiferromagnets while the absence of magnetic long-range-order is due to perfect two-dimensionality of the spin-lattice protected by non-magnetic site disorder.
