近藤型六硼化铈（CeB6）中的隐磁相和共存磁相
Hidden and coexistent magnetic phases in Kondo-type Cerium Hexaboride (CeB6)
摘要：
重费米子材料CeB 6显示出隐藏的磁性有序相。除了众所周知的铁磁（FM）和反铁磁（AFM）相，CeB 6被推测形成一个独特的反铁四极（AFQ）相，这是轨道的性质。隐藏在许多表征方法，不能评估轨道排序，辩论继续对起源。从电子结构的计算，我们发现，这三个阶段的能量几乎简并，这表明磁畴壁的形式，可能与缺陷边界。只有自旋-轨道耦合的计算才能再现实验中发现的大多数能带结构和费米面，这表明了晶体场分裂的重要性。模拟电离峰，即，Ce的f0和f1态也与光电子能谱数据一致。小的压力使AFM稳定在FM阶段，这是在低温下观察到的阶段。我们建议在各种情况下实现这种小的物理压力，例如本征缺陷的影响，如空位，反位，表面效应等。
英文摘要：
The heavy fermion material CeB6 shows hidden magnetic ordered phases. Besides well-known Ferromagnetic(FM) and Antiferromagnetic(AFM) phases, CeB6 is speculated to form a unique antiferroquadrupolar (AFQ) phase that is orbital in nature. Hidden from many characterization methods that cannot assess orbital ordering, debate continue on the origins. From electronic-structure calculations, we find that these three phases are energetically almost degenerate, suggesting that magnetic domain walls form, possibly with defect boundaries. Only calculations with spin-orbit coupling reproduce most band structures and Fermi surfaces, as found in experiment, indicating the importance of crystal-field splitting. Simulated ionization peaks, i.e., Ce f0 and f1 states, also agree with photoemission data. Small pressures stabilizes the AFM over the FM phase, which is the observed phase at low temperature. We propose to realize such small physical pressure under various situations e.g. effect of intrinsic defects such as vacancies, antisites, surface effects etc.
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