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arXiv · 2609.24792

III-V antiphase boundaries are not generated by Si or Ge substrate step edges

Charles Cornet·Sreejith Pallikkara Chandrasekharan·Audrey Gilbert·Milan Silvestre·Rozenn Bernard·Pascal Turban·Gilles Patriarche·Eric Tournie·Laurent Pedesseau·Jean-Baptiste Rodriguez
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Abstract

We critically review recent experimental and theoretical advances on the valence- and structure-mismatched heteroepitaxy of III-V semiconductors on group-IV substrates. We examine key aspects including wetting behavior, atomic configurations at the hetero-interface, substrate passivation, and the stability of antiphase boundaries (APBs). By synthesizing these findings with pioneering studies, we propose a refined description of antiphase boundaries formation. Our analysis shows that hetero-interface formation is dictated by substrate terrace reconstruction, demonstrating that APBs are not generated at monoatomic step edges. This generalized III-V/IV growth framework provides new insights for the integration of III-V semiconductors on group-IV platforms and, more broadly, for valence-mismatched heteroepitaxy.

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Charles Cornet, Sreejith Pallikkara Chandrasekharan, Audrey Gilbert, Milan Silvestre, Rozenn Bernard, Pascal Turban, Gilles Patriarche, Eric Tournie, Laurent Pedesseau, Jean-Baptiste Rodriguez. 2026-09-21. III-V antiphase boundaries are not generated by Si or Ge substrate step edges. https://arxiv.org/abs/2609.24792

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