4d强关联钙钛矿氧化物SrNbO3超薄膜中的大Rashba参数
Large Rashba parameter for 4d strongly correlated perovskite oxide SrNbO3 ultrathin films
AI总结：
通过测量不同厚度SrNbO3超薄膜的输运性质，利用弱反局域化理论分析磁电阻，发现自旋轨道散射时间与动量散射时间成反比，证实Rashba效应主导，并获得了迄今金属氧化物超薄膜中最大的Rashba参数。
摘要：
为阐明SrNbO3（SNO）超薄膜的自旋弛豫机制，在金属-绝缘体转变两侧测量了一系列不同厚度的SNO薄膜的输运性质。利用弱反局域化理论对磁电阻进行分析，推导出自旋轨道散射时间，并发现自旋轨道散射时间与动量散射时间成反比。这一结果可用D`Yakonov Perel`机制解释，表明Rashba效应占主导。所测得的Rashba参数值大于其他金属氧化物超薄膜报道的值。
英文摘要：
To elucidate the spin relaxation mechanism of SrNbO3 (SNO) ultrathin films, the transport properties of a series of SNO films with various thicknesses were measured on both sides of the metal insulator transition. The spin orbit scattering time was deduced from the analysis of the magnetoresistance with weak antilocalization theory, and it was found that the spin orbit scattering time was inversely proportional to the momentum scattering time. This result was explained in terms of the D`Yakonov Perel` mechanism, indicative of the dominant Rashba effect. The values of the Rashba parameter were largest in the values reported for other ultrathin films of metallic oxides.
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