Magnetotransport studies of interfacial interactions in van der Waals structures

该项目旨在探索界面相互作用对二维材料中出现的量子相的影响，使用磁输运作为主要探针。两种不同类型的货车范德华异质结构，已进行了初步的工作，将进行探讨。异质结构将具有不同厚度的超导NbSe 2或魔角扭曲双层石墨烯作为主要成分。然后将这些中的任何一个与其他一些2D材料近似化，以研究这些系统中出现的超导相或其他相互作用和相关诱导基态如何受到影响或修改。对于NbSe 2，我们将系统地探索一系列货车范德华异质结构，其中额外的2D材料导致例如界面处不同程度的电荷转移，具有不寻常的磁性或已知表现出电荷密度波物理。功函数的差异最初将作为选择特定邻近2D材料的主要标准。对于扭曲的双层石墨烯，RuCl 3，一种具有丰富磁性的Kitaev量子自旋液体竞争者，将作为接近的2D材料。

This project intends to explore the impact interfacial interactions can have on quantum phases that appear in 2D materials using magneto-transport as the primary probe. Two different types of van der Waals heterostructures, on which preliminary work has been performed, will be explored. Heterostructures will either have superconducting NbSe2 of varying thickness or magic angle twisted bilayer graphene as the main constituent. Either of these is then proximitized with some other 2D material in order to investigate how the superconducting phase or other interaction and correlation induced ground states that appear in these systems are affected or modified. For NbSe2 we will systematically explore a series of van der Waals heterostructures where the extra 2D material causes for instance a different degree of charge transfer at the interface, has unusual magnetic properties or is known to exhibit charge density wave physics. The difference in the work function will initially serve as the main criterion to select particular proximitizing 2D materials. For twisted bilayer graphene, RuCl3, a Kitaev quantum spin liquid contender with rich magnetic properties, will serve as the 2D material brought into proximity.