Self-assembled nanocolumns in Bi2Se3 grown by molecular beam epitaxy
Journal Article
·
· Journal of Vacuum Science and Technology A
- Univ. of Delaware, Newark, DE (United States); National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
- 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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