LaAlO3-SrTiO3异质结构中Rashba诱导的磁导振荡
Rashba induced magnetoconductance oscillations in the LaAlO3-SrTiO3 heterostructure
摘要：
我们报道了栅控LaAlO $_3$ -SrTiO $_3$样品正常态面内磁导的测量结果。当磁场的方向在界面平面内发生变化时，信号相对于场与电流方向之间的角度显示周期性振荡。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诱导的间隙在$Γ$点的开放和关闭的Ti面外轨道有其带底接近费米能量的系统。
英文摘要：
We report measurements of the normal state in-plane magnetoconductance in gated LaAlO$_3$-SrTiO$_3$ 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 $Γ$ point for those Ti out-of-plane orbitals having their band minimum close to the Fermi energy of the system.
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