Magnons and excitation continuum in XXZ triangular antiferromagnetic model: Application to Ba3CoSb2O9
Magnons and excitation continuum in XXZ triangular antiferromagnetic model: Application to Ba3CoSb2O9
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DOI：
10.1103/physrevb.91.134423
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发表时间：
2015-04-22
影响因子：
3.7
通讯作者：
Trumper, A. E.
中科院分区：
文献类型：
--
作者：
Ghioldi, E. A.;Mezio, A.;Trumper, A. E.
用级数展开和平均场Schwinger玻色子方法研究了三角晶格反铁磁XXZ模型的激发谱。通过级数展开计算的单磁振子谱在布里渊区边缘的中点显示出旋量极小值，各向异性参数的所有值都在0
We investigate the excitation spectrum of the triangular-lattice antiferromagnetic XXZ model using series expansion and mean field Schwinger boson approaches. The single-magnon spectrum computed with series expansion exhibits rotonic minima at the middle points of the edges of the Brillouin zone, for all values of the anisotropy parameter in the range 0