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IF 3.5 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2025-03-21 DOI:10.1063/5.0252684

Jiahe Cao, Yan Wang, Chuang Zhang, Guofeng Hu, Weihua Tang, Guosong Zeng, Daniela Gogova, Chee-Keong Tan

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引用次数: 0

摘要

在本研究中，我们采用第一性原理计算探讨了不同层厚的单斜Al2O3/Ga2O3超晶格的结构和电子特性，并与(AlxGa1-x)2O3合金进行了对比分析。我们的研究考察了超晶格结构和合金在不同铝浓度下的晶格常数和电子能带隙，揭示了成分与电子特性之间错综复杂的关系。电子特性分析表明，随着 Al2O3/Ga2O3 超晶格中 Al2O3 单层数从 2 个增加到 6 个，带隙也相应地从 5.29 eV 扩大到 6.43 eV。单斜 Al2O3 和 Ga2O3 之间的带排列呈现出 II 型带排列。块体材料与 Al2O3/Ga2O3 超晶格之间的导带和价带偏移随 Al2O3 单层数量的变化而变化。我们的研究使人们对 Al2O3/Ga2O3 超晶格的特性有了更深入的了解，并为用于先进半导体器件应用的 (AlxGa1-x)2O3 合金中的铝相分离问题提出了解决方案。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Investigation on the structural and electronic property of monoclinic Al2O3/β-Ga2O3 superlattice with varying layer periods

In this study, we employ first-principles calculations to explore the structural and electronic properties of monoclinic Al2O3/Ga2O3 superlattices with varied layer thickness and to perform a comparative analysis with (AlxGa1−x)2O3 alloys. Our investigation examines the lattice constants and electronic energy bandgaps of both the superlattice structures and alloys across different Al concentrations, shedding light on the intricate relationship between composition and electronic properties. The analysis on electronic properties reveals that as the number of Al2O3 monolayers in the Al2O3/Ga2O3 superlattice rises from 2 to 6 monolayers, the bandgap correspondingly expands from 5.29 to 6.43 eV. The band alignment between monoclinic Al2O3 and Ga2O3 exhibits a type-II band alignment. The conduction and valence band offsets between the bulk material and Al2O3/Ga2O3 superlattice varies with change in the number of Al2O3 monolayers. Our study gives a deeper insight into the properties of the Al2O3/Ga2O3 superlattice and suggests a solution to the Al-phase separation issue in (AlxGa1−x)2O3 alloys for advanced semiconductor device applications.

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来源期刊

Applied Physics Letters 物理-物理：应用

CiteScore

6.40

自引率

10.00%

发文量

1821

审稿时长

1.6 months

期刊介绍： Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology. In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics. APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field. Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.