论文标题
磁性绝缘体MNBI2TE4 N（bi2te3）（n = 0，1，。。。。。。
Crystal structure and Raman active lattice vibrations of magnetic topological insulators MnBi2Te4 n(Bi2Te3) (n = 0, 1, . . . , 6)
论文作者
论文摘要
进一步，固有磁性拓扑拓扑剂的结构MNBI2TE4 N（BI2TE3）具有N <4，其中索引n是在附近的Septuple Te-bi-te-te-te-te-mn-te-mn-te-bi-te构建块之间插入的Quintuple te-bi-te-bi-te构建块的数量，使用n = 4，5和6是x-ray dife dife dife x-ray finded x-ray dife。计算单位细胞参数和原子位置。总结了所获得的和可用的结构数据，以表明MNBI2TE4 N（BI2TE3）的所有成员的晶体结构遵循了立方关闭堆积原则，与给定成员的空间组无关。然后应用共聚焦拉曼光谱。对n = 1，n = 1的拉曼光谱的振动模式的数量，频率，对称性和扩展的比较分析。 。 。 ，6，以及MNBI2TE4（n = 0）和BI2TE3（n = Infinity）表明，MNBI2TE4 N（BI2TE3）的晶格动力学N> 0，由Quintuple构件中的合作原子置换在Quintuple Building Blocks中被压倒性地统治。
Further to the structure of the intrinsic magnetic topological insulators MnBi2Te4 n(Bi2Te3) with n<4, where index n is the number of quintuple Te-Bi-Te-Bi-Te building blocks inserted between the neighboring septuple Te-Bi-Te-Mn-Te-Bi-Te building blocks, the structure of the members with n=4, 5 and 6 was studied using X-ray powder diffraction. The unit cell parameters and atomic positions were calculated. The obtained and available structural data were summarized to show that the crystal structure of all members of MnBi2Te4 n(Bi2Te3) follows the cubic close packing principle, independently of the space group of the given member. Confocal Raman spectroscopy was then applied. Comparative analysis of the number, frequency, symmetry, and broadening of the vibration modes responsible for the lines in the Raman spectra of the systems with n=1,. . . ,6, as well as MnBi2Te4 (n=0) and Bi2Te3 (n=infinity) has shown that lattice dynamics of MnBi2Te4 n(Bi2Te3) with n>0 overwhelmingly dominates by the cooperative atomic displacements in the quintuple building blocks.
