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arXiv 2602.07591cond-mat.mtrl-sci
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Sapphire衬底上导电α-(Al₀.₁₆Ga₀.₈₄)₂O₃/Ga₂O₃异质结构的热稳定性与相变

Thermal Stability and Phase Transformation of Conductive $α$-$(\mathrm{Al}_{x}\mathrm{Ga}_{1-x})_{2}\mathrm{O}_{3}/\mathrm{Ga}_{2}\mathrm{O}_{3}$ Heterostructures on Sapphire Substrates

University of Utah(犹他大学);Rice University(莱斯大学);Kyungpook National University(庆北国立大学);Utah Nanofab Electron Microscopy and Surface Analysis Laboratory, The University of Utah(犹他大学犹他纳米加工电子显微镜与表面分析实验室);Shared Equipment Authority, Rice University(莱斯大学共享设备管理局)

Botong Li, Shisong Luo, Jaeheon Jung, Bobby G. Duersch, Cheng Chang, Lucas Lau, Zonghao Zhang, Jianhua Li, Hunter Ellis, Imteaz Rahaman, Roy Byung Kyu Chung, Kai Fu, Yuji Zhao

AI总结:

本研究通过原位高温X射线衍射等技术,探讨了在Sapphire衬底上生长的导电α-(Al₀.₁₆Ga₀.₈₄)₂O₃/Ga₂O₃异质结构的热稳定性和相变特性,发现其在550-600°C范围内具有良好的稳定性,并观察到α-相向β-相的转变及Ga₂O₃的晶格重构。

摘要:

通过原位高温X射线衍射(HT-XRD)、扫描电子显微镜(SEM)和原子力显微镜(AFM),研究了在Sapphire衬底上导电α-(Al₀.₁₆Ga₀.₈₄)₂O₃/Ga₂O₃异质结构的热稳定性和相变特性。通过雾化化学气相沉积在Sapphire衬底上生长了掺氟(F)的导电α-(Al₀.₁₆Ga₀.₈₄)₂O₃/Ga₂O₃异质结构,实现了霍尔迁移率28 cm² V⁻¹ s⁻¹和电子浓度1.4×10²⁰ cm⁻³。异质结构显示出在约550-600°C的热稳定性,且在加热过程中观察到相变行为,包括α-(Al₀.₁₆Ga₀.₈₄)₂O₃向β-(Al₀.₁₆Ga₀.₈₄)₂O₃的相变,以及Ga₂O₃的晶格重构。此外,异质结构在加热过程中表现出良好的导电性和结构稳定性,这为高性能热电材料的开发提供了新的方向。

英文摘要:

Thermal stability and phase transformation of conductive $α$-$(\mathrm{Al}_{0.16}\mathrm{Ga}_{0.84})_{2}\mathrm{O}_{3}/\mathrm{Ga}_{2}\mathrm{O}_{3}$ heterostructures on sapphire substrates were investigated using in situ high-temperature X-ray diffraction (HT-XRD), scanning electron microscopy (SEM), and atomic force microscopy (AFM). Conductive $α$-$(\mathrm{Al}_{0.16}\mathrm{Ga}_{0.84})_{2}\mathrm{O}_{3}/\mathrm{Ga}_{2}\mathrm{O}_{3}$ heterostructures with fluorine (F) doping were grown by mist chemical vapor deposition on sapphire substrates, achieving a Hall mobility of $28~\mathrm{cm^{2}\,V^{-1}\,s^{-1}}$ and an electron concentration of $1.4\times10^{20}~\mathrm{cm^{-3}}$. The heterostructures exhibited thermal stability up to approximately $550$--$

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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