Nowotny烟囱梯型化合物Ru $_2$ Sn $_3$的线性非饱和磁电阻
Linear nonsaturating magnetoresistance in the Nowotny chimney ladder compound Ru$_2$Sn$_3$
摘要：
我们提出了在高品质的单晶的诺沃特尼烟囱梯化合物Ru $_2$ Sn $_3$的磁阻测量。我们发现线性和非饱和的磁阻高达20 T。在小磁场下，磁阻随磁场取向从正曲率到负曲率而变化。在5 T以上，对于任何测量的角度，磁阻在高达20 T时都没有显示出饱和的迹象。磁电阻的各向异性形状随温度的升高而保持不变，并服从科勒规则。我们关联的线性和非饱和磁阻的一个小费米表面的热点，可能形成的结构转变的结果。我们讨论了磁场下的电子-电子相互作用的相关性和方面的拓扑非平凡的性能预期在Ru $_2$ Sn $_3$。
英文摘要：
We present magnetoresistivity measurements in high-quality single crystals of the Nowotny chimney ladder compound Ru$_2$Sn$_3$. We find a linear and nonsaturating magnetoresistance up to 20 T. The magnetoresistance changes with the magnetic field orientation at small magnetic fields, from a positive to a negative curvature. Above 5 T, the magnetoresistance shows no sign of saturation up to 20 T for any measured angle. The shape of the anisotropy in the magnetoresistance remains when increasing temperature and Kohler's rule is obeyed. We associate the linear and nonsaturating magnetoresistance to a small Fermi surface with hot spots, possibly formed as a consequence of the structural transition. We discuss the relevance of electron-electron interactions under magnetic fields and aspects of the topologically nontrivial properties expected in Ru$_2$Sn$_3$.
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