In the present work, it was found for the first time that an electron beam used in reflection high-energy electron diffraction technique stimulates a reconstruction transition from a sapphire (√31×√31)R±9° superstructure which is chemically inert under an ammonia flux to an unreconstructed (1×1) structure with subsequent surface nitridation. The electron beam initiates electron-stimulated oxygen desorption from the sapphire surface followed by formation of oxygen vacancies, which are potential energetically accessible centers for the primary nuclei formation of the AlN crystalline phase.

中文翻译：

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电子刺激的重构转变（√31×√31）R±9°-（1×1）导致的AlN晶相形成的特殊性

在本工作中，首次发现在反射高能电子衍射技术中使用的电子束会激发蓝宝石（√31×√31）R±9°上层结构的重建转变，该上层结构在高温下化学惰性氨通量变为未重建的（1×1）结构，随后进行表面氮化。电子束从蓝宝石表面引发电子激发的氧解吸，随后形成氧空位，这是AlN晶相初级原子核形成的潜在能量可到达的中心。