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Assembly of Arbitrary Designer Heterostructures with Atomically Clean Interfaces

Journal Article · · Advanced Materials Interfaces
 [1];  [2];  [3];  [4];  [4];  [4];  [5];  [5];  [6];  [2];  [3];  [1];  [1]
  1. Forschungszentrum Juelich (Germany). Peter Grünberg Institut (PGI-3); Jülich Aachen Research Alliance (Germany); RWTH Aachen Univ. (Germany). Institute for Experimental Physics II B
  2. Forschungszentrum Juelich (Germany). Peter Grünberg Institut (PGI-3); Jülich Aachen Research Alliance (Germany); RWTH Aachen Univ. (Germany). Institute for Experimental Physics IV A
  3. Forschungszentrum Juelich (Germany). Peter Grünberg Institut (PGI-3); Jülich Aachen Research Alliance (Germany)
  4. Pavol Jozef Šafárik University, Košice (Slovakia); Slovak Academy of Sciences, Košice (Slovakia). Institute of Experimental Physics
  5. National Institute for Materials Science, Namiki (Japan)
  6. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Van der Waals heterostructures are an excellent platform for studying intriguing interface phenomena, such as moiré and proximity effects. Many of these phenomena occurring in such heterostructures' interfaces and surfaces have so far been hampered because of their high sensitivity to disorder and interface contamination. Here, it reports a dry polymer-based assembly technique to fabricate arbitrary designer van der Waals heterostructures with atomically clean surfaces. The key features of the suspended dry pick-up and flip-over assembly technique are: 1) the heterostructure surface never comes into contact with polymers, 2) the assemble is entirely solvent-free, 3) it is entirely performed in a glovebox, and 4) it only requires temperatures below 130 °C. By performing ambient atomic force microscopy and atomically-resolved scanning tunneling microscopy on example heterostructures, it demonstrates the fabrication of air-sensitive heterostructures with ultra-clean interfaces and surfaces. It envisions that, due to the avoidance of polymer melting, this technique is potentially compatible with heterostructure assembly under ultra-high vacuum conditions, which promises ultimate heterostructure quality.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE); European Union (EU)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
2267619
Journal Information:
Advanced Materials Interfaces, Journal Name: Advanced Materials Interfaces Journal Issue: 1 Vol. 11; ISSN 2196-7350
Publisher:
Wiley-VCHCopyright Statement
Country of Publication:
United States
Language:
English

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Figures / Tables (4)


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