Periodicity of the spin structure observed in the optical response of CeBi single crystals.
Periodicity of the spin structure observed in the optical response of CeBi single crystals.
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CeBi 单晶光学响应中观察到的自旋结构的周期性。
DOI：
10.1103/physrevlett.76.3428
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发表时间：
1996
影响因子：
8.6
通讯作者：
Wachter
中科院分区：
文献类型：
--
作者：
Pittini;Schoenes;Hulliger;Wachter
我们报告的光学电导率的CeBi在不同的磁相的研究。从顺磁相到各种反铁磁和亚铁磁相，在p→ d跃迁的吸收边以下出现了不同的新带间跃迁。这些新的带间跃迁在足够强的磁场中消失，以使自旋平行排列。新的带间跃迁的出现无疑与布里渊区的折叠有关，布里渊区的折叠是自旋结构周期性改变的结果。
We report a study of the optical conductivity of CeBi in different magnetic phases. Going from the paramagnetic phase to the various antiferromagnetic and ferrimagnetic phases, different new interband transitions appear below the absorption edge of the p→ d transitions. These new interband transitions disappear in a magnetic field that is sufficiently strong to align the spins parallel. The appearance of new interband transitions is indubitably associated with the folding of the Brillouin zone, which is a consequence of the change of the periodicity of the spin structure.