层状SrZnSb $_2$的大线性磁电阻和磁热电势
Large linear magnetoresistance and magnetothermopower in layered SrZnSb$_2$
摘要：
本文报道了具有准二维Sb层的层状SrZnSb $_2$晶体的大线性磁电阻（$\sim 300\%$，9T场，2K）和磁热电势。随着磁场的增加，从半经典抛物型场相关磁电阻到线性场相关磁电阻的过渡被观察到。结合半经典回旋效应和量子极限磁电阻效应可以很好地描述磁电阻效应。磁场也增强了热电势。我们的结果可以很好地理解为狄拉克态在体能带结构中的磁输运。
英文摘要：
We report the large linear magnetoresistance ($\sim 300\%$ in 9 T field at 2 K) and magnetothermopower in layered SrZnSb$_2$ crystal with quasi-two-dimensional Sb layers. A crossover from the semiclassical parabolic field dependent magnetoresistance to linear field dependent magnetoresistance with increasing magnetic field is observed. The magnetoresistance behavior can be described very well by combining the semiclassical cyclotron contribution and the quantum limit magnetoresistance. Magnetic field also enhances the thermopower. Our results can be well understood by the magnetotransport of Dirac states in the bulk band structure.
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