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Title: Self-assembled nanocolumns in Bi2Se3 grown by molecular beam epitaxy

Journal Article · · Journal of Vacuum Science and Technology A
DOI:https://doi.org/10.1116/6.0000831· OSTI ID:1769592
ORCiD logo [1]; ORCiD logo [2]
  1. Univ. of Delaware, Newark, DE (United States); National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
  2. Univ. of Delaware, Newark, DE (United States)

Layered van der Waals (vdW) materials grown by physical vapor deposition techniques are generally assumed to have a weak interaction with the substrate during growth. This leads to films with relatively small domains that are usually triangular and a terraced morphology. In this paper, we demonstrate that Bi2Se3, a prototypical vdW material, will form a nano-column morphology when grown on GaAs(001) substrates. This morphology is explained by a relatively strong film/substrate interaction, long adatom diffusion lengths, and a high reactive selenium flux. In conclusion, this discovery paves the way toward growth of self-assembled vdW structures even in the absence of strain.

Research Organization:
Univ. of Delaware, Newark, DE (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation Major Research Instrumentation
Grant/Contract Number:
SC0017801; 1828141
OSTI ID:
1769592
Alternate ID(s):
OSTI ID: 1769986
Journal Information:
Journal of Vacuum Science and Technology A, Vol. 39, Issue 3; ISSN 0734-2101
Publisher:
American Vacuum Society / AIPCopyright Statement
Country of Publication:
United States
Language:
English

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