交换作用对 CeF3晶体磁性和磁光效应的影响

研究了顺磁性晶体CeF3内交换作用有效场随温度的变化关系,给出了其形式为Hin=(-0.68-0.002T)×10-6M.结合该关系,用量子理论的计算得到了与实验值吻合较好的磁化率倒数、Verdet常数倒数随温度的变化关系,并且用光磁效应的概念和规律对结果作了进一步分析,指出光诱导促进了该晶体内电子间的交换作用.     

硼原子高Rydberg态能级研究

利用最弱受约束电子势模型理论,通过对最弱受约束电子的识别,将Martin公式推广到了多电子原子系统.依此研究了B原子的2s2np(n≥30)系列Rydberg能级,理论计算值与实验值吻合较好,二者的相对误差小于6.59×10-5,达到了很高的精度.     

Tip-induced superconductivity commonly existing in the family of transition-metal dipnictides MPn_2

We report the tip-induced superconductivity on the topological semimetal NbSb₂, similar to the observation on TaAs₂ and NbAs₂. Belonging to the same family of MPn₂, all these materials possess similar band structures, indicating that the tip-induced superconductivity may be closely related to their topological nature and share a common mechanism. Further analysis suggests that a bulk band should play the dominant role in such local superconductivity most likely through interface coupling. In addition, the compatibility between the induced superconductivity and tips’ ferromagnetism gives an evidence for its unconventional nature. These results provide further clues to elucidate the mechanism of the tip-induced superconductivity observed in topological materials.     

变系数再生散度线性模型和它的估计

本文研究了一类变系数再生散度线性模型.利用局部最大似然的方法,得到了兴趣参数的估计,同时也研究了局部权和光滑参数的确定以及统计推断,结果推广了文献[11]的工作.     

Electronic Structure of the Weak Topological Insulator Candidate Zintl Ba3Cd2Sb4

One of the greatest triumph of condensed matter physics in the past ten years is the classification of materials by the principle of topology.The existence of topological protected dissipationless surface state makes topological insulators great potential for applications and hotly studied.However,compared with the prosperity of strong topological insulators,theoretical predicted candidate materials and experimental confirmation of weak topological insulators(WTIs) are both extremely rare.By com...