{"title":"Quantum transport in double finger gate devices under AC plus DC voltage gate control","authors":"Moh-Erlangga-Aditya Rifandi , Quoc-Hung Phan , Chi-Shung Tang , Nzar Rauf Abdullah , Vidar Gudmundsson","doi":"10.1016/j.physb.2025.416978","DOIUrl":null,"url":null,"abstract":"<div><div>A scattering matrix method is employed to investigate the quantum transport in the two-dimensional electron gas of an n-type split-gate quantum device with double finger gates under combined AC and DC voltage gate control. The investigation focuses specifically on the effects of four parameters on the quantum conductance: the DC potential amplitude, the AC potential amplitude, the distance between the two finger gates, and the effective photon energy. The results reveal that all four parameters have a profound effect on the quantum conductance outcomes and lead to the formation of different quasi-bound states and resonance peaks. The theoretical analysis conducted in this study provides useful guidance for the design of n-type gate-controlled devices with AC+DC-controlled double finger gates.</div></div>","PeriodicalId":20116,"journal":{"name":"Physica B-condensed Matter","volume":"703 ","pages":"Article 416978"},"PeriodicalIF":2.8000,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Physica B-condensed Matter","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S092145262500095X","RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"PHYSICS, CONDENSED MATTER","Score":null,"Total":0}
引用次数: 0
Abstract
A scattering matrix method is employed to investigate the quantum transport in the two-dimensional electron gas of an n-type split-gate quantum device with double finger gates under combined AC and DC voltage gate control. The investigation focuses specifically on the effects of four parameters on the quantum conductance: the DC potential amplitude, the AC potential amplitude, the distance between the two finger gates, and the effective photon energy. The results reveal that all four parameters have a profound effect on the quantum conductance outcomes and lead to the formation of different quasi-bound states and resonance peaks. The theoretical analysis conducted in this study provides useful guidance for the design of n-type gate-controlled devices with AC+DC-controlled double finger gates.
本文采用散射矩阵法研究了在交流和直流电压栅极联合控制下，双指栅极 n 型分裂栅量子器件的二维电子气体中的量子输运。研究特别关注四个参数对量子传导的影响：直流电势振幅、交流电势振幅、双指栅极之间的距离以及有效光子能量。研究结果表明，这四个参数都对量子电导结果产生了深远的影响，并导致形成不同的准束缚态和共振峰。本研究进行的理论分析为设计具有交流+直流控制双指栅极的 n 型栅极控制器件提供了有用的指导。
期刊介绍：
Physica B: Condensed Matter comprises all condensed matter and material physics that involve theoretical, computational and experimental work.
Papers should contain further developments and a proper discussion on the physics of experimental or theoretical results in one of the following areas:
-Magnetism
-Materials physics
-Nanostructures and nanomaterials
-Optics and optical materials
-Quantum materials
-Semiconductors
-Strongly correlated systems
-Superconductivity
-Surfaces and interfaces
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