论文标题
Dzyaloshinskii-Moriya和各向异性交流对立方Kagome AntiferRomagnets Mn $ _3 $ X and Mn $ _3 $ _3 $ ab的影响
Impact of Dzyaloshinskii-Moriya and anisotropic exchange interactions on the cubic kagome antiferromagnets Mn$_3$X and Mn$_3$AB
论文作者
论文摘要
我们对$ L1_2 $ MN $ _3 $ x和antiperovskite Mn $ _3 $ ab Alyoys的ABC堆叠的Mn原子的Kagome飞机进行对称分析。除了已知可以稳定这些材料中120°旋转结构的单离子 - 肛门和基塔夫型各向异性交换外，我们的分析还会导致dzyaloshinskii-moriya的交互交流，并进一步γ型各向异性各向异性交换，而脉冲型脉冲交易所之间最近的neighbor闪闪发光之间。这些新术语的存在表明不影响120°地基群的能量学，这解释了它们在先前的最小磁模型中的不存在。但是，我们继续表明，当考虑自旋波激发时，它们的影响就会显而易见。我们通过计算非弹性中子散射横截面来强调这些影响，以说明探测这些掩饰相互作用的存在和相对强度的实验手段。
We perform a symmetry analysis of the ABC-stacked kagome planes of Mn atoms common to the $L1_2$ Mn$_3$X and antiperovskite Mn$_3$AB alloys. In addition to the single-ion-anisotropy and Kitaev-type anisotropic exchange known to stabilize 120° spin structures in these materials, our analysis results in a staggered Dzyaloshinskii-Moriya interaction and further gamma-type anisotropic exchange between nearest-neighbor spins. The presence of these new terms is shown not to affect the energetics of the 120° ground-states which explains their absence in prior minimal magnetic models. We go on to show, however, that their influence becomes apparent when spin-wave excitations are considered. We highlight these effects by calculating inelastic neutron scattering cross-sections to illustrate experimental means of probing the existence and relative strengths of these cloaked interactions.
