The low temperature ( T < 5 K) electron spin resonance in topological Kondo insulator SmB 6 is investigated. It is shown that spin relaxation time of the paramagnetic centers responsible for low temperature electron spin resonance in SmB 6 is about ~ 10 −8 s, which exceeds by five orders of magnitude the widely accepted spin and charge fluctuation time ~ 10 −13 s in the homogeneous mixed valence state of this material. This discrepancy may be attributed to the formation of the specific paramagnetic centers in the sample surface–spin polarons.

中文翻译：

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强相关拓扑绝缘体 SmB6 表面的自旋涨落

研究了拓扑近藤绝缘体 SmB 6 中的低温 ( T < 5 K) 电子自旋共振。结果表明，SmB 6 中负责低温电子自旋共振的顺磁中心的自旋弛豫时间约为~10 -8 s，比广泛接受的自旋和电荷波动时间~10 -13 s 高五个数量级。这种材料的均匀混合价态。这种差异可能归因于样品表面自旋极化子中特定顺磁中心的形成。