论文标题
与位点依赖性G-Tensor的双量子点中的G量量共振
g-tensor resonance in double quantum dots with site-dependent g-tensors
论文作者
论文摘要
长期以来，Pauli Spin Blockade（PSB）一直是与InterDot Tunneling $ t $的双量子点（DQD）系统中旋转读数的重要工具。在本文中，我们表明，如果两个点经历了由站点依赖的G_l $ $ G_L $和左右点的$ G_R $引起的明显有效磁场，则可以取消封锁，并且由于Spin-Flip Tunneling和Hyperfine Interaction（Hyprine interaction），左右点的左和右点要比自旋轨道交互（SOI）引起的泄漏电流更为明显。使用在特殊参数方案中获得的分析结果，我们显示有关点的平面外和平面g因子的信息可以从磁磁道曲线的特征特征中推断出来。对于对称DQD，我们预测在特征外磁场处的泄漏电流中有明显的最大值，$ b^* = t/μ_b\ sqrt {g_z^l g_z^r} $，该$我们称为系统的G-Tensor共振。此外，我们将结果扩展到包含强SOI的影响，并认为在这种更普遍的情况下，泄漏电流带有有关系统的G量组件和SOI的信息。
Pauli spin blockade (PSB) has long been an important tool for spin read-out in double quantum dot (DQD) systems with interdot tunneling $t$. In this paper we show that the blockade is lifted if the two dots experience distinct effective magnetic fields caused by site-dependent g-tensors $g_L$ and $g_R$ for the left and right dot, and that this effect can be more pronounced than the leakage current due to the spin-orbit interaction (SOI) via spin-flip tunneling and the hyperfine interaction (HFI) of the electron spin with the host nuclear spins. Using analytical results obtained in special parameter regimes, we show that information about both the out-of-plane and in-plane g-factors of the dots can be inferred from characteristic features of the magneto-transport curve. For a symmetric DQD, we predict a pronounced maximum in the leakage current at the characteristic out-of-plane magnetic field $B^* = t/ μ_B \sqrt{g_z^L g_z^R}$ which we term the g-tensor resonance of the system. Moreover, we extend the results to contain the effects of strong SOI and argue that in this more general case the leakage current carries information about the g-tensor components and SOI of the system.
