论文标题
混合蜂窝量子磁铁TMNI $ _3 $ al $ _9 $在巡回电子和ISING时刻的相互作用
Interplay of itinerant electrons and Ising moments in a hybrid honeycomb quantum magnet TmNi$_3$Al$_9$
论文作者
论文摘要
量子材料中巡回电子与局部磁矩之间的相互作用带来了丰富而有趣的现象，并刺激了理论框架中的各种发展。在这项工作中，对新合成的蜂窝晶格磁铁TMNI $ _3 $ al $ _9 $进行了热力学，电动传输和中子衍射测量。根据实验数据，构建了磁场温度相图，显示了三个本质上不同的磁区域。 $ {t _ {\ rm n} = 2.97 \ pm 0.02} \ \ rm k $ tm $^{3+} $ momments在零字段中订购反铁磁性。我们发现TM $^{3+} $离子形成伪双脚的基态，其类似于Ising的矩与二维蜂窝层正常。沿易于轴的磁场应用逐渐抑制抗铁磁顺序，而有利于临界场$ {b_c = 0.92 \ pm 0.05} \ rm t $的诱导的铁磁状态。在$ b_c $附近，观察到了量子自旋波动的强大增强。讨论了当地力矩的量子性质和与巡回电子的耦合。
The interplay between itinerant electrons and local magnetic moments in quantum materials brings about rich and fascinating phenomena and stimulates various developments in the theoretical framework. In this work, thermodynamic, electric transport, and neutron diffraction measurements were performed on a newly synthesized honeycomb lattice magnet TmNi$_3$Al$_9$. Based on the experimental data, a magnetic field temperature phase diagram was constructed, exhibiting three essentially different magnetic regions. Below ${T_{\rm N}=2.97 \pm 0.02}\ \rm K$ Tm$^{3+}$ moments order antiferromagnetically in zero field. We found that the Tm$^{3+}$ ions form a pseudo-doublet ground state with the Ising-like moments lying normal to the two-dimensional honeycomb layers. Application of a magnetic field along the easy axis gradually suppresses the antiferromagnetic order in favor of an induced ferromagnetic state above the critical field ${B_c=0.92 \pm 0.05}\ \rm T$. In the vicinity of $B_c$, a strong enhancement of the quantum spin fluctuations was observed. The quantum Ising nature of the local moments and the coupling to itinerant electrons are discussed.
