论文标题
范德华异质结构的强烈粘合干燥转移技术
Strongly adhesive dry transfer technique for van der Waals heterostructure
论文作者
论文摘要
可以用原子尖锐的界面堆叠范德华材料,为构建异质结构提供了新的材料平台。机械堆叠的技术挑战是在机械剥落后拾取了剥落的原子薄材料,而没有化学和机械降解。化学惰性六角硼硝酸盐(HBN)已被广泛用于封装和拾取VDW材料。但是,由于HBN的粘附相对较弱,基于HBN的VDW异质结构受到限制。我们报告了一种新的干燥转移技术。我们使用了两个VDW半导体(ZNPS3和CRPS4)来拾起并封装VDW异质结构的图层,否则这些层很难制造。通过与优化的多碳酸酯(PCL)相结合,提供了较强的粘附,我们展示了各种垂直异质结构设备,包括具有原子干净界面的NBSE2 Quasi-2d超导NBSE2 Josephson连接。基于PCL的VDW堆叠方法的多功能性为组装复合物2D VDW材料而没有界面降解提供了新的途径。
That one can stack van der Waals materials with atomically sharp interfaces has provided a new material platform of constructing heterostructures. The technical challenge of mechanical stacking is picking up the exfoliated atomically thin materials after mechanical exfoliation without chemical and mechanical degradation. Chemically inert hexagonal boron nitride (hBN) has been widely used for encapsulating and picking up vdW materials. However, due to the relatively weak adhesion of hBN, assembling vdW heterostructures based on hBN has been limited. We report a new dry transfer technique. We used two vdW semiconductors (ZnPS3 and CrPS4) to pick up and encapsulate layers for vdW heterostructures, which otherwise are known to be hard to fabricate. By combining with optimized polycaprolactone (PCL) providing strong adhesion, we demonstrated various vertical heterostructure devices, including quasi-2D superconducting NbSe2 Josephson junctions with atomically clean interface. The versatility of the PCL-based vdW stacking method provides a new route for assembling complex 2D vdW materials without interfacial degradation.