Mondal Kallol, Kadolkar Charudatt
Department of Physics, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India.
J Phys Condens Matter. 2021 Feb 5;33(14). doi: 10.1088/1361-648X/abdc8e.
We have studied the nearest neighbor Heisenberg model with added Dzyaloshinskii-Moriya interaction using Schwinger boson mean-field theory considering the in-plane component as well as out-of-plane component. Motivated by the experimental result of vesignieite that the ground state is in along-range order state, we first looked at the classical ground state of the model and considered the mean-field ansatz which mimics the classical ground state in the largelimit. We have obtained the ground-state phase diagram of this model and calculated properties of different phases. We have also studied the above model numerically using exact diagonalization up to a system size= 30. We have compared the obtained results from these two approaches. Our results are in agreement with the experimental result of the vesignieite.
我们使用施温格玻色子平均场理论，考虑面内分量以及面外分量，研究了具有附加Dzyaloshinskii-Moriya相互作用的最近邻海森堡模型。受维西涅ite的实验结果启发，即基态处于长程有序状态，我们首先研究了该模型的经典基态，并考虑了在大极限下模拟经典基态的平均场假设。我们得到了该模型的基态相图，并计算了不同相的性质。我们还使用精确对角化方法对上述模型进行了数值研究，系统规模最大为30。我们比较了这两种方法得到的结果。我们的结果与维西涅ite的实验结果一致。
