Influence of Amorphous Structure on Polymorphism in Vanadia: Article No. 076103

Lauren Garten, Paul Ndione, David Ginley, Kevin Stone, Laura Schelhas, Badri Shyam, Apurva Mehta, Michael Toney

Research output: Contribution to journalArticlepeer-review

15 Scopus Citations

Abstract

Normally we think of the glassy state as a single phase and therefore crystallization from chemically identical amorphous precursors should be identical. Here we show that the local structure of an amorphous precursor is distinct depending on the initial deposition conditions, resulting in significant differences in the final state material. Using grazing incidence total x-ray scattering, we have determined the local structure in amorphous thin films of vanadium oxide grown under different conditions using pulsed laser deposition (PLD). Here we show that the subsequent crystallization of films deposited using different initial PLD conditions result in the formation of different polymorphs of VO2. This suggests the possibility of controlling the formation of metastable polymorphs by tuning the initial amorphous structure to different formation pathways.
Original languageAmerican English
Number of pages6
JournalAPL Materials
Volume4
Issue number7
DOIs
StatePublished - 2016

NREL Publication Number

  • NREL/JA-5K00-66923

Keywords

  • amorphous state
  • crystal structure
  • crystallization
  • polymorphism
  • pulsed laser deposition

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