GaN/AlN异质结构中二维空穴气体的太赫兹回旋共振

IF 3.5 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2025-05-28 DOI:10.1063/5.0273413

J. Wang, D. G. Rickel, C. F. C. Chang, Z. Zhang, P. Peng, Y. Huang, A. K. Azad, D. Jena, H. G. Xing, S. A. Crooker

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引用次数: 0

摘要

最近在GaN/AlN异质结中发现的高导电性二维空穴气体（2dhg）为高效互补GaN电子打开了大门，这是宽带隙半导体器件物理学中长期存在的挑战。电输运研究和模拟表明，在这些2dhg中，重空穴和轻空穴的价带都被占据，但对移动空穴基本参数的直接实验表征仍处于早期阶段。在这里，我们使用时域太赫兹光谱和高达31 T的脉冲磁场直接测量了低温（8 K）下氮化镓基2dhg中可移动2D孔的回旋共振，揭示了包括有效质量、密度、散射时间和迁移率在内的关键材料特性。

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THz cyclotron resonance of a 2D hole gas in a GaN/AlN heterostructure

The recent discovery of highly conducting two-dimensional hole gases (2DHGs) in GaN/AlN heterojunctions has opened the door to efficient complementary GaN electronics, a long-standing challenge in wide-bandgap semiconductor device physics. Electrical transport studies and simulations indicate that both heavy- and light-hole valence bands are occupied in these 2DHGs, but direct experimental characterization of the fundamental parameters of the mobile holes remains at an early stage. Here, we use time-domain terahertz spectroscopy and pulsed magnetic fields up to 31 T to directly measure cyclotron resonance of the mobile 2D holes in these GaN-based 2DHGs at low temperature (8 K), revealing key material properties including effective masses, densities, scattering times, and mobilities.

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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.