Self-assembled nanocolumns in Bi2Se3grown by molecular beam epitaxy

Theresa P. Ginley, Stephanie Law

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


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 nanocolumn 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. This discovery paves the way toward the growth of self-assembled vdW structures even in the absence of strain.

Original languageEnglish (US)
Article number033401
JournalJournal of Vacuum Science and Technology A: Vacuum, Surfaces and Films
Issue number3
StatePublished - May 1 2021

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films


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