论文标题
沮丧的磁性细胞结构和紧急的potts nematicity in camn $ _2 $ p $ _2 $
Frustrated Magnetic Cycloidal Structure and Emergent Potts Nematicity in CaMn$_2$P$_2$
论文作者
论文摘要
我们报告了单晶CAMN上的中子 - 划分结果$ _2 $ p $ _2 $，其中包含瓦楞MN蜂窝层并确定其地面磁性结构。衍射模式由突出的（1/6、1/6，$ l $）组成，相互晶格单元（r.l.u。; $ l $ =整数）磁性布拉格反射，其温度依赖性的强度与一阶防反超磁相过渡时的温度相关性一致平面内$ 6 \ times6 $磁性单元带有有序的旋转，在主轴方向上，在每个sublattice上最近的邻居之间旋转60度步骤，形成蜂窝结构，与$ p_ac $磁场组一致。我们发现其他一些磁性子组对称（$ p_a2/c $，$ p_c2/m $，$ p_s \ bar {1}，p_c2，p_c2，p_cm，p_s1 $）的paramagnetic $ p \ bar {3} m11^} m11^\ prime $ $ $ $ $ $ $ $ cyrcy symmetry cymetal symmetry ancmettry cymettry consement consement concement the obs syment concelent the obs the obs verver verver verver verver verver verver verver verver verver的模式。我们将我们的发现与沮丧的$ J_1 $ - $ J_2 $ - $ J_3 $ HEISENBERG HEASENBERG HONECOMB ANTANISOTROPY和POTTS NEMATITY的出现
We report neutron-diffraction results on single-crystal CaMn$_2$P$_2$ containing corrugated Mn honeycomb layers and determine its ground-state magnetic structure. The diffraction patterns consist of prominent (1/6, 1/6, $L$) reciprocal lattice unit (r.l.u.; $L$ = integer) magnetic Bragg reflections, whose temperature-dependent intensities are consistent with a first-order antiferromagnetic phase transition at the Néel temperature $T_{\rm N} = 70(1)$ K. Our analysis of the diffraction patterns reveals an in-plane $6\times6$ magnetic unit cell with ordered spins that in the principal-axis directions rotate by 60-degree steps between nearest neighbors on each sublattice that forms the honeycomb structure, consistent with the $P_Ac$ magnetic space group. We find that a few other magnetic subgroup symmetries ($P_A2/c$, $P_C2/m$, $P_S\bar{1}, P_C2, P_Cm, P_S1$) of the paramagnetic $P\bar{3}m11^\prime$ crystal symmetry are consistent with the observed diffraction pattern. We relate our findings to frustrated $J_1$-$J_2$-$J_3$ Heisenberg honeycomb antiferromagnets with single-ion anisotropy and the emergence of Potts nematicity
