Experimental Evidence of Cubic Rashba Effect in an Inversion-Symmetric Oxide
Experimental Evidence of Cubic Rashba Effect in an Inversion-Symmetric Oxide
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DOI：
10.1103/physrevlett.108.206601
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发表时间：
2012-05-14
影响因子：
8.6
通讯作者：
Kimura, T.
中科院分区：
文献类型：
--
作者：
Nakamura, H.;Koga, T.;Kimura, T.
我们提出的证据立方Rashba自旋分裂的准二维电子气形成在（001）SrTiO 3单晶表面的弱局域化或反局域化（WAL）分析的低温磁电阻。我们的WAL数据很好地拟合了自旋分裂对的模型，假设m（j）= +/- 3/2，其中k（x）-k（y）平面中电子波矢量k（平行于）的2 π旋转伴随着自旋量子化轴的6 π旋转。这一发现属于p对称性的t（2g）电子带来自d电子在SrTiO 3中，这提供了洞察（001）SrTiO 3的表面电子状态。
We present evidence of cubic Rashba spin splitting in a quasi-two-dimensional electron gas formed at a surface of (001) SrTiO3 single crystal from the weak localization or antilocalization (WAL) analysis of the low-temperature magnetoresistance. Our WAL data were well fitted by the model assuming m(j) = +/- 3/2 for the spin-split pair, in which 2 pi rotation of the electron wave vector k(parallel to) in the k(x)-k(y) plane accompanies 6 pi rotation of the spin quantization axis. This finding pertains to the p symmetry of the t(2g) electronic band derived from d electrons in SrTiO3, which provides insights into the surface electronic state of (001) SrTiO3.