论文标题
来自多体相互作用的COPC/VSE2中的自旋依赖性隧道障碍
Spin-dependent Tunneling Barriers in CoPc/VSe2 from Many-Body Interactions
论文作者
论文摘要
混合磁性异质结构是有趣的，新近可用的平台，可探索量子物理及其应用。使用最先进的多体扰动理论，我们预测了磁性VSE 2单层钴苯甲酸（COPC）分子的自组装单层的能级比对。预测的预计状态在COPC上的密度与实验扫描隧道光谱一致。与实验一致，我们预测光谱的未居住区域中的肩膀是平均场计算中没有的。与几乎自旋排级的气相边界分子轨道不同，界面处的隧道屏障是自旋依赖性的，这是对量子信息和旋转型应用程序的兴趣。实验观察到的肩膀和预测的自旋依赖性隧道屏障均来自界面杂交状态中的多体相互作用。我们的结果展示了控制这些混合磁性异质结构的特性的复杂多体物理学，并提出了通过界面耦合的修改来操纵自旋依赖性隧道障碍的可能性。
Mixed-dimensional magnetic heterostructures are intriguing, newly available platforms to explore quantum physics and its applications. Using state-of-the-art many-body perturbation theory, we predict the energy level alignment for a self-assembled monolayer of cobalt phthalocyanine (CoPc) molecules on magnetic VSe 2 monolayers. The predicted projected density of states on CoPc agrees with experimental scanning tunneling spectra. Consistent with experiment, we predict a shoulder in the unoccupied region of the spectra that is absent from mean-field calculations. Unlike the nearly spin-degenerate gas phase frontier molecular orbitals, the tunneling barriers at the interface are spin-dependent, a finding of interest for quantum information and spintronics applications. Both the experimentally observed shoulder and the predicted spin-dependent tunneling barriers originate from many-body interactions in the interface-hybridized states. Our results showcase the intricate many-body physics that governs the properties of these mixed-dimensional magnetic heterostructures, and suggests the possibility of manipulating the spin-dependent tunneling barriers through modifications of interface coupling.
