论文标题
抗fiferromagnet pbfobo4中的一刺激和两种刺激
One- and two-magnon excitations in antiferromagnet PbFeBO4
论文作者
论文摘要
提出了PBFOBO4自旋动力学的线性自旋理论研究。结果表明，在Neel温度以下的拉曼散射实验中观察到的模式是光学镁和两麦克诺族激发。基于磁通能，两麦克努子条带线路和魏斯温度，得出了第三个邻居的一致的交换耦合常数，并将其与从头算计算的结果进行了比较。观察到的两麦克农带与状态的一块密度的微小偏差表明，镁 - 麦克努尼相互作用的作用令人惊讶地忽略不计。
The linear spin-wave theory study of PbFeBO4 spin dynamics is presented. It is shown that the modes observed in Raman scattering experiments below Neel temperature are optical magnon and two-magnon excitations. Based on the magnon energy, two-magnon band lineshape, and Weiss temperature, the consistent set of the exchange coupling constants up the third neighbor is derived and compared with the results of ab initio calculations. The small deviation of the observed two-magnon band from the one-magnon density of states suggests a surprisingly negligible role of magnon-magnon interactions.
