Influence of amorphous structure on polymorphism in vanadia

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 significa...

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Veröffentlicht in:APL materials 2016-07, Vol.4 (7)
Hauptverfasser: Stone, Kevin H., Schelhas, Laura T., Garten, Lauren M., Shyam, Badri, Mehta, Apurva, Ndione, Paul F., Ginley, David S., Toney, Michael F.
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container_issue 7
container_start_page
container_title APL materials
container_volume 4
creator Stone, Kevin H.
Schelhas, Laura T.
Garten, Lauren M.
Shyam, Badri
Mehta, Apurva
Ndione, Paul F.
Ginley, David S.
Toney, Michael F.
description 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.
doi_str_mv 10.1063/1.4958674
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subjects amorphous state
crystal structure
crystallization
MATERIALS SCIENCE
polymorphism
pulsed laser deposition
SOLAR ENERGY
title Influence of amorphous structure on polymorphism in vanadia
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