论文标题
4F电子的二元论和重毛绒化合物ybcoc $ _ {2} $的高温反铁磁性
Dualism of the 4f electrons and high-temperature antiferromagnetism of the heavy-fermion compound YbCoC$_{2}$
论文作者
论文摘要
我们报告了对非中心三元碳化物YBCOC $ _ {2} $的首次研究。我们的磁化，比热，电阻率和中子衍射测量始终表明，该系统的表现为重毛，在压力下的néel温度下方显示出振幅调制的磁性结构，在压力下达到$ t_ {n} $ = 33 K。根据我们的从头算计算，这是基于YB的系统中最高价值的，这表明YB的4F电子状态具有双重性质 - 即，由于它们与CO的3D状态的强大杂交，4F状态4F状态暴露了本地化和静态性质。
We report on the first study of the noncentrosymmetric ternary carbide YbCoC$_{2}$. Our magnetization, specific heat, resistivity and neutron diffraction measurements consistently show that the system behaves as a heavy-fermion compound, displaying an amplitude-modulated magnetic structure below the Néel temperature reaching $T_{N}$ = 33 K under pressure. Such a large value, being the highest among the Yb-based systems, is explained in the light of our ab initio calculations, which show that the 4f electronic states of Yb have a dual nature -- i.e., due to their strong hybridization with the 3d states of Co, 4f states expose both localized and itinerant properties.
