期刊
2D MATERIALS
卷 7, 期 4, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/2053-1583/abad0b
关键词
two-dimensional materials; van der Waals heterostructures; polycaprolactone; dry transfer technique; NbSe2; transition metal thiophosphate
资金
- Leading Researcher Program of the National Research Foundation of Korea [2020R1A3B2079375]
- Institute for Basic Science of the Republic of Korea [IBS-R009-G1]
- Global Research Laboratory Program through the National Research Foundation of Korea (NRF) [2015K1A1A2033332]
- DOE QPRESS [DE-SC0019300]
- Brookhaven National Laboratory [DE-SC0012704]
- National Research Foundation of Korea (NRF) grants - Ministry of Science, ICT (SRC Program) [NRF-2017R1A5A1014862]
- National Research Foundation of Korea (NRF) - Ministry of Science and ICT (MSIT) [2015R1A5A1037627]
- Basic Science Research Program, Quantum Computing Technology Development Program through the National Research Foundation of Korea (NRF) - Korean government (MSIT) [2018R1A2A3075438, 2019M3E4A1080145]
- Creative-Pioneering Researchers Program through Seoul National University (SNU)
- National Research Foundation of Korea [2017R1A5A1014862, 2015R1A5A1037627, IBS-R009-D1-2020-A00] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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 (ZnPS(3)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 NbSe(2)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.
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