What question did this study set out to answer?

The central aim is to explore the synthesis and electrical transport properties of Bi films on GaAs substrates.

February 25, 2026APL MaterialsOpen Access

Synthesis and transport properties of epitaxial Bi (111) films on GaAs (111) substrates

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Examines the electrical transport properties of epitaxial bismuth films on GaAs substrates, highlighting tuning potential.

The central aim is to explore the synthesis and electrical transport properties of Bi films on GaAs substrates.
Epitaxial Bi films grown directly on GaAs substrates without a buffer layer.
Substrate treatment involved Ar+ ion-milling and annealing.
Conductivity and transport measurements conducted at various film thicknesses.
Optimal substrate treatment led to high-quality, single-domain epitaxial Bi films.
Significantly higher conductivity observed in films grown on well-treated substrates.
Transport measurements indicated that conductivity and mobility improve with increasing film thickness.
A hole-like state emerged in the 5 nm film, suggesting changes in electronic states at reduced thickness.

Jena et al. (2026) studied this question.

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