New epitaxy method stabilised four metastable crystalline phases
A research team led by MIT used a method it calls diffusion-activated epitaxy to experimentally stabilise four distinct crystalline phases. The preprint says diffraction and microscopy data for three phases did not match structures in the crystal databases examined.
Event / data period: 2026-10-09
Published: · Updated:
The method places a higher-melting-point oxide substrate in a liquid environment containing tin flux and cobalt powder. During heat treatment, diffusion is activated at the substrate surface while its bulk remains solid. The team examined products formed on LaAlO₃, LSAT and SrTiO₃ using X-ray diffraction and scanning transmission electron microscopy.
The researchers identified four phases; for three, the measured diffraction and microscopy results did not match entries in the experimental and computational inorganic-structure databases they checked. Small sample volumes limited full crystallographic structure determination. The paper presents the technique as a laboratory route for materials exploration; it does not demonstrate an application or scaled production.
Data
Reported study result
The authors identified four distinct crystalline phases across experiments on three oxide substrates; this is not a count of commercial products.
| Distinct phases identified with diffusion-activated epitaxy | 4 | The authors identified four distinct crystalline phases across experiments on three oxide substrates; this is not a count of commercial products. |
Methodology
Count reported from X-ray diffraction, electron microscopy and energy-dispersive X-ray spectroscopy; three phases did not match structures in the databases examined.
Updated:
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