Rashba induced magnetoconductance oscillations in the LaAlO3-SrTiO3 heterostructure
Rashba induced magnetoconductance oscillations in the LaAlO3-SrTiO3 heterostructure
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DOI：
10.1103/physrevb.86.201105
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发表时间：
2012-11-26
影响因子：
3.7
通讯作者：
Gabay, M.
中科院分区：
文献类型：
--
作者：
Fete, A.;Gariglio, S.;Gabay, M.
我们报告的正常状态的面内磁导在门控LaAlO 3-SrTiO 3样品的测量。当磁场的方向在界面平面内改变时，信号显示出相对于磁场和电流方向之间的角度的周期性振荡。我们表明，在欠掺杂的最佳掺杂范围内，费米表面重建发生由于Rashba自旋轨道项和振荡是由于磁场引起的开放和关闭的间隙在伽马点的那些Ti面外轨道有其带最小值接近费米能量的系统。
We report measurements of the normal state in-plane magnetoconductance in gated LaAlO3-SrTiO3 samples. As the orientation of the magnetic field changes within the plane of the interface, the signal displays periodic oscillations with respect to the angle between the field and the direction of the current. We show that in the underdoped to optimally doped range, a Fermi surface reconstruction takes place due to the Rashba spin-orbit term and that the oscillations are due to a magnetic field induced opening and closing of a gap at the Gamma point for those Ti out-of-plane orbitals having their band minimum close to the Fermi energy of the system.