Spin-orbit tuned optoelectronics in magnetized germanene

IF 4.6 2区物理与天体物理 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Results in Physics Pub Date : 2025-09-25 DOI:10.1016/j.rinp.2025.108443

Farshad Azizi , Hamed Rezania

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Abstract

This study investigates the optoelectronic properties of Germanene, a two dimensional honeycomb lattice material, under the influence of spin–orbit coupling (SOC) and external magnetic fields. Utilizing the Kane–Mele model, we incorporate tight-binding, intrinsic SOC, and Zeeman interactions to describe the electronic band structure. The Green’s function approach is employed to compute optical conductivity, dielectric function, refractive index, and absorption coefficient, highlighting the impact of SOC-induced bandgap opening and magnetic field effects. Our findings reveal that SOC enhances optical absorption and tunes plasmonic excitations, making Germanene a promising candidate for advanced optoelectronic devices, such as photodetectors and optical modulators. Germanene’s operational spectrum spans infrared (0–1.65 eV) to visible (1.65–2 eV), with model-predicted advantages over graphene/silicene including enhanced IR tunability via stronger SOC (43 meV gap) and field-sensitive plasmonics, enabling superior photodetection efficiency and modulation capabilities. The results underscore the potential of Germanene in spintronics and valleytronics, driven by its tunable electronic and optical properties.

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磁化锗烯的自旋轨道调谐光电子学

本文研究了二维蜂窝晶格材料锗烯在自旋轨道耦合（SOC）和外加磁场作用下的光电特性。利用Kane-Mele模型，我们结合了紧密结合、固有SOC和Zeeman相互作用来描述电子能带结构。采用格林函数方法计算光学电导率、介电函数、折射率和吸收系数，突出了soc诱导的带隙打开和磁场效应的影响。我们的研究结果表明，SOC可以增强光吸收并调节等离子体激发，使锗烯成为先进光电器件（如光电探测器和光调制器）的有希望的候选者。锗烯的工作光谱跨越红外（0-1.65 eV）到可见光（1.65-2 eV），与石墨烯/硅烯相比，其模型预测的优势包括通过更强的SOC （43 meV间隙）和场敏感等离子体增强的红外可调性，从而实现卓越的光探测效率和调制能力。结果强调了锗烯在自旋电子学和谷电子学中的潜力，其可调谐的电子和光学特性驱动了锗烯。

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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来源期刊

Results in Physics MATERIALS SCIENCE, MULTIDISCIPLINARYPHYSIC-PHYSICS, MULTIDISCIPLINARY

CiteScore

8.70

自引率

9.40%

发文量

754

审稿时长

50 days

期刊介绍： Results in Physics is an open access journal offering authors the opportunity to publish in all fundamental and interdisciplinary areas of physics, materials science, and applied physics. Papers of a theoretical, computational, and experimental nature are all welcome. Results in Physics accepts papers that are scientifically sound, technically correct and provide valuable new knowledge to the physics community. Topics such as three-dimensional flow and magnetohydrodynamics are not within the scope of Results in Physics. Results in Physics welcomes three types of papers: 1. Full research papers 2. Microarticles: very short papers, no longer than two pages. They may consist of a single, but well-described piece of information, such as: - Data and/or a plot plus a description - Description of a new method or instrumentation - Negative results - Concept or design study 3. Letters to the Editor: Letters discussing a recent article published in Results in Physics are welcome. These are objective, constructive, or educational critiques of papers published in Results in Physics. Accepted letters will be sent to the author of the original paper for a response. Each letter and response is published together. Letters should be received within 8 weeks of the article''s publication. They should not exceed 750 words of text and 10 references.