A Polycarbonate-Assisted Transfer Method for van der Waals Contacts to Magnetic Two-Dimensional Materials

Magnetic two-dimensional (2D) materials have garnered significant attention for their potential to revolutionize 2D spintronics due to their unique magnetic properties. However, their air-sensitivity and highly insulating nature of the magnetic semiconductors present substantial challenges for devic...

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Bibliographic Details
Published in:Micromachines (Basel) 2024-11, Vol.15 (11), p.1401
Main Authors: Yang, Kunlin, Zhao, Guorui, Zhao, Yibin, Xiao, Jie, Wang, Le, Liu, Jiaqi, Song, Wenqing, Lan, Qing, Zhao, Tuoyu, Huang, Hai, Mei, Jia-Wei, Shi, Wu
Format: Article
Language:English
Subjects:
Contact resistance
dry-transfer method
Electrodes
Electrons
Graphene
Heterojunction devices
Integrated circuit fabrication
magnetic 2D materials
Magnetic materials
Magnetic properties
Magnetic semiconductors
Magnetic transitions
Methods
Polycarbonate resins
Polycarbonates
Polymethyl methacrylate
Semiconductors
Silicon wafers
Spintronics
Two dimensional materials
van der Waals contacts
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Summary:Magnetic two-dimensional (2D) materials have garnered significant attention for their potential to revolutionize 2D spintronics due to their unique magnetic properties. However, their air-sensitivity and highly insulating nature of the magnetic semiconductors present substantial challenges for device fabrication with effective contacts. In this study, we introduce a polycarbonate (PC)-assisted transfer method that effectively forms van der Waals (vdW) contacts with 2D materials, streamlining the fabrication process without the need for additional lithography. This method is particularly advantageous for air-sensitive magnetic materials, as demonstrated in Fe GeTe . It also ensures excellent interface contact quality and preserves the intrinsic magnetic properties in magnetic semiconductors like CrSBr. Remarkably, this method achieves a contact resistance four orders of magnitude lower than that achieved with traditional thermally evaporated electrodes in thin-layer CrSBr devices and enables the observation of sharp magnetic transitions similar to those observed with graphene vdW contacts. Compatible with standard dry-transfer processes and scalable to large wafer sizes, our approach provides a straightforward and effective solution for developing complex magnetic heterojunction devices and expanding the applications of magnetic 2D materials.
ISSN:2072-666X
2072-666X
DOI:10.3390/mi15111401