$\mathrm{Ba}\mathrm{Bi}{\mathrm{O}}_3$ is a charged ordered Peierls-like perovskite well known for its superconducting properties upon K or Pb doping. We present a study on the transport and electronic properties of $\mathrm{Ba}\mathrm{Bi}{\mathrm{O}}_3$ perovskite with strong Bi deficiency. We show that it is possible to synthesize $\mathrm{Ba}\mathrm{Bi}{\mathrm{O}}_3$ thin layers with Bi vacancies above 8–10% by depositing an yttrium-stabilized zirconia capping layer. By combining transport measurements with ab initio calculations we propose a scenario where the Bi vacancies give rise to the formation of polarons and suggest that the electrical transport is dominated by the migration of these polarons trapped at ${\mathrm{Bi}}^{3+}$ sites. Our paper shows that cation vacancies engineering, hardly explored to date, appears as a promising pathway to tune the electronic and functional properties of perovskites.

中文翻译：

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缺乏Bi的BaBiO3中的极化子形成

$巴双{\mathrm{哦}}_3$是一种带电荷的有序 Peierls 类钙钛矿，以其在 K 或 Pb 掺杂时的超导特性而闻名。我们提出了关于传输和电子特性的研究$巴双{\mathrm{哦}}_3$钙钛矿具有强烈的 Bi 缺乏。我们表明可以合成$巴双{\mathrm{哦}}_3$通过沉积钇稳定的氧化锆覆盖层来制备具有 8-10% 以上 Bi 空位的薄层。通过将输运测量与ab initio计算相结合，我们提出了一种方案，其中 Bi 空位引起极化子的形成，并表明电输运主要由这些被困在${双}^{3+}$网站。我们的论文表明，迄今为止几乎没有探索过的阳离子空位工程似乎是调整钙钛矿电子和功能特性的一种有前途的途径。