论文标题
单晶srtio $ _3 $板中的对称性破裂：EPR表现
Symmetry breaking in single crystal SrTiO$_3$ plates: EPR manifestations
论文作者
论文摘要
电子杂质Fe $^{3+} $和Mn $^{4+} $中心的电子选磁共振共振研究表明，毫米级钛酸钛酸层钛酸层的晶体结构的对称性高于105 K以上的105 k低于立方体到四方的体积，与常规的低模式抗衡阶段相比结果表明，效果不是源于残余应力。它的大小（观察到的四方失真）和特定的表现取决于板的方向，表面质量和样品的几何形状。提出了观察到的现象的特殊性，并讨论了其实现的可能情景。
Electron paramagnetic resonance studies of the impurity Fe$^{3+}$ and Mn$^{4+}$ centers indicate that the symmetry of the crystal structure of millimeter-scale strontium titanate plates above 105 K lowers in the bulk from cubic to tetragonal, different from that of the conventional low-temperature antiferrodistortive phase. It is shown that the effect does not originate from the residual stress; its magnitude (observed tetragonal distortion) and particular manifestations depend on plate orientation, surface quality and the geometry of a sample. Peculiarities of the observed phenomenon are presented and possible scenario of its realization is discussed.
