Journal of Applied Physics最新文献_第10页

Reassessing iron–gallium recombination activity in silicon 重新评估硅中的铁镓重组活动

Journal of Applied Physics Pub Date : 2024-04-03 DOI: 10.1063/5.0198737

T. T. Le, Zhuangyi Zhou, Alan Chen, Zhongshu Yang, F. Rougieux, D. Macdonald, A. Liu

{"title":"Reassessing iron–gallium recombination activity in silicon","authors":"T. T. Le, Zhuangyi Zhou, Alan Chen, Zhongshu Yang, F. Rougieux, D. Macdonald, A. Liu","doi":"10.1063/5.0198737","DOIUrl":"https://doi.org/10.1063/5.0198737","url":null,"abstract":"In this work, we present a comprehensive re-evaluation of the iron–gallium (FeGa) recombination parameters in silicon using injection-dependent lifetime spectroscopy (IDLS). Ga-doped silicon wafers (of varying resistivities) with precise concentrations of intentional iron contamination in the silicon wafer bulk, through ion implantation and distribution, were used. The presence of interstitial Fei and FeGa, and their lifetime-limiting effects in these silicon wafers, were confirmed through measuring the effective minority carrier lifetime changes during the conditions that are known to cause FeGa dissociation and association. The presence of Fe was also confirmed by deep-level transient spectroscopy. To ensure accurate IDLS analysis of the FeGa defect in silicon, a lifetime linearization scheme was employed to effectively filter out interference by other defects. Error analysis was employed to find the combination of defect parameters that best fit the experimental data and to ascertain the range of uncertainty associated with the IDLS best-fit results. The optimal fitting of the experimental IDLS by Shockley–Read–Hall statistics produced an electron capture cross section σn=2.3×10−14cm2, hole capture cross section σp=1.1×10−14cm2, and a trap energy level Et=EV+0.2−0.01+0.02eV for the FeGa defect in silicon. The extracted defect parameters are also verified by experimentally measuring the crossover point of Fei and FeGa lifetime curves.","PeriodicalId":502933,"journal":{"name":"Journal of Applied Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140746842","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Long-range magnon transfer across a bridging ferromagnetic chain via sequential and tunnel routes 通过顺序和隧道途径在桥接铁磁链上进行长程磁子传输

Journal of Applied Physics Pub Date : 2024-04-03 DOI: 10.1063/5.0189726

Elmar Petrov

引用次数: 0

A multi-party verifiable quantum proxy signature scheme based on quantum teleportation 基于量子远传的多方可验证量子代理签名方案

Journal of Applied Physics Pub Date : 2024-04-02 DOI: 10.1063/5.0201618

Chengxiang Wang, Dianjun Lu, Fuyao Tian, Weixin Yao

引用次数: 0

Measuring the in-plane thermal diffusivity of anisotropic solids by lock-in infrared thermography: Laser-spot vs laser-line heating 利用锁相红外热成像技术测量各向异性固体的面内热扩散率：激光点加热与激光线加热

Journal of Applied Physics Pub Date : 2024-04-02 DOI: 10.1063/5.0198882

A. Bedoya, A. Salazar, A. Mendioroz, E. Marín

{"title":"Measuring the in-plane thermal diffusivity of anisotropic solids by lock-in infrared thermography: Laser-spot vs laser-line heating","authors":"A. Bedoya, A. Salazar, A. Mendioroz, E. Marín","doi":"10.1063/5.0198882","DOIUrl":"https://doi.org/10.1063/5.0198882","url":null,"abstract":"A method is proposed to measure the in-plane thermal diffusivity of anisotropic solids along an arbitrary direction using laser-line lock-in thermography. In this method, the sample is heated by an intensity-modulated laser beam, which impinges on the sample surface with the shape of a narrow strip. The resulting temperature oscillations are recorded by a thermographic camera and a phase thermogram is obtained by lock-in processing the image sequence. The thermal diffusivity along the direction perpendicular to the laser line can be determined from the linear dependence of phase lag with the distance to the heating line using the slope method. Unlike laser-spot lock-in thermography, in which the slope method only provides the thermal diffusivity along the principal directions, in this configuration, the thermal diffusivity can be measured experimentally along any direction, just selecting the relative orientation of the sample with respect to the laser line. Moreover, this configuration allows averaging several parallel phase profiles leading to more reliable thermal diffusivity values. The experimental results are presented for a highly anisotropic material, namely, a unidirectional carbon fiber-reinforced polymer plate.","PeriodicalId":502933,"journal":{"name":"Journal of Applied Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140752041","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Three-dimensional reconstruction of x-ray emission volumes in magnetized liner inertial fusion from sparse projection data using a learned basis 利用学习基础从稀疏投影数据三维重建磁化衬垫惯性融合中的 X 射线发射体积

Journal of Applied Physics Pub Date : 2024-04-02 DOI: 10.1063/5.0198839

J. Fein, E. Harding, William E. Lewis, M. Weis, M. Schaeuble

{"title":"Three-dimensional reconstruction of x-ray emission volumes in magnetized liner inertial fusion from sparse projection data using a learned basis","authors":"J. Fein, E. Harding, William E. Lewis, M. Weis, M. Schaeuble","doi":"10.1063/5.0198839","DOIUrl":"https://doi.org/10.1063/5.0198839","url":null,"abstract":"The ability to visualize x-ray and neutron emission from fusion plasmas in 3D is critical to understand the origin of the complex shapes of the plasmas in experiments. Unfortunately, this remains challenging in experiments that study a fusion concept known as Magnetized Liner Inertial Fusion (MagLIF) due to a small number of available diagnostic views. Here, we present a basis function-expansion approach to reconstruct MagLIF stagnation plasmas from a sparse set of x-ray emission images. A set of natural basis functions is “learned” from training volumes containing quasi-helical structures whose projections are qualitatively similar to those observed in experimental images. Tests on several known volumes demonstrate that the learned basis outperforms both a cylindrical harmonic basis and a simple voxel basis with additional regularization, according to several metrics. Two-view reconstructions with the learned basis can estimate emission volumes to within 11% and those with three views recover morphology to a high degree of accuracy. The technique is applied to experimental data, producing the first 3D reconstruction of a MagLIF stagnation column from multiple views, providing additional indications of liner instabilities imprinting onto the emitting plasma.","PeriodicalId":502933,"journal":{"name":"Journal of Applied Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140753123","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Identifying the charge states of carbon vacancies in 4H-SiC by ab initio metadynamics 通过 ab initio 元动力学确定 4H-SiC 中碳空位的电荷状态

Journal of Applied Physics Pub Date : 2024-04-02 DOI: 10.1063/5.0195321

Yuanchao Huang, Xuanyu Jiang, Tianqi Deng, Deren Yang, X. Pi

{"title":"Identifying the charge states of carbon vacancies in 4H-SiC by ab initio metadynamics","authors":"Yuanchao Huang, Xuanyu Jiang, Tianqi Deng, Deren Yang, X. Pi","doi":"10.1063/5.0195321","DOIUrl":"https://doi.org/10.1063/5.0195321","url":null,"abstract":"4H Silicon carbide (4H-SiC) is widely recognized as a highly promising material for high-voltage and high-power electronic applications due to its exceptional properties. The performance of devices based on 4H-SiC is often weakened by the presence of carbon-related point defects, particularly carbon vacancies (VC). The defects of VC introduce deep-level traps (e.g., Z1/2 and EH6/7) that deteriorate device functionality. Experimental and theoretical studies on VC have led to some conflicting results about the charge states of VC, especially for the charge state ordering of EH6/7. We now employ ab initio metadynamics (META) to systematically investigate configuration space including the direction and magnitude of bond distortion and identify the most stable structures of VC. Eventually, the charge states of VC in 4H-SiC are identified. The Z1 (EH6) and Z2 (EH7) indicate transitions from acceptor (donor) levels of VC, located on the h and k sublattice sites, respectively. Z1 and Z2 demonstrate negative-U ordering, characterized by U values of −0.16 and −0.37 eV, respectively. Conversely, EH6 and EH7 display positive-U ordering, with U values of 0.16 and 0.08 eV, respectively. The current results provide insights into the properties of VC in 4H-SiC, highlighting the effectiveness of META in the exploration of complex potential energy surfaces associated with point defects in solids.","PeriodicalId":502933,"journal":{"name":"Journal of Applied Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140754415","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A hot phonon bottleneck observed upon incorporation of SnF2 to MASnI3 films and its possible role in increasing photocarrier diffusion length 在 MASnI3 薄膜中掺入 SnF2 后观察到的热声子瓶颈及其在增加光载流子扩散长度方面可能发挥的作用

Journal of Applied Physics Pub Date : 2024-04-01 DOI: 10.1063/5.0194851

F. Xu, Haoming Wei, Bingqiang Cao

引用次数: 0

A study on the reduction of microstructural non-uniformity in Ni-multilayer ceramic capacitors via repeated highly accelerated life tests and analyses of degraded local areas 通过反复进行高加速寿命试验和对局部退化区域进行分析，降低镍多层陶瓷电容器微观结构不均匀性的研究

Journal of Applied Physics Pub Date : 2024-04-01 DOI: 10.1063/5.0182651

M. Nagayoshi, Ryosuke Sakata

引用次数: 0

A programmable metasurface based on acoustic black hole for real-time control of flexural waves 基于声学黑洞的可编程元表面，用于实时控制挠曲波

Journal of Applied Physics Pub Date : 2024-04-01 DOI: 10.1063/5.0187726

Kun Su, Lixia Li

{"title":"A programmable metasurface based on acoustic black hole for real-time control of flexural waves","authors":"Kun Su, Lixia Li","doi":"10.1063/5.0187726","DOIUrl":"https://doi.org/10.1063/5.0187726","url":null,"abstract":"The time-modulated active medium with linear independent frequency conversion method has been demonstrated to enable wave orientation and reconstruction. However, due to the symmetric scattering field, this technique requires intricate microcircuit designs. To overcome this limitation, this paper proposes a tunable piezoelectric metasurface based on acoustic black holes (ABHs) to redirect flexural wave reflections. The system can convert an incident flexural wave into a reflected wave of any direction and frequency. This is accomplished through the linear time modulation of the sensing signal, which breaks the constraints of Snell’s law inherent in traditional designs and is insensitive to the incident amplitude. The coupling of the ABH damping system with a linear independent frequency conversion mechanism allows for the conversion of an incident flexural wave into a reflected wave in any direction and frequency while also eliminating the influence of second harmonic reflection on the wave field and simplifying the time modulation circuit. In addition, this paper demonstrates arbitrary angle reflection, focusing, beam splitting, and frequency conversion of the incident wave. By improving the flexibility of elastic wave manipulation, this paper introduces a new approach for active control of elastic waves and provides a design method that can be employed in a variety of applications ranging from vibration protection of engineering structures to vibration sensing and evaluation.","PeriodicalId":502933,"journal":{"name":"Journal of Applied Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140774174","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Geometry-dependent acoustic higher-order topological phases on a two-dimensional honeycomb lattice 二维蜂巢晶格上与几何有关的声学高阶拓扑相位

Journal of Applied Physics Pub Date : 2024-04-01 DOI: 10.1063/5.0202383

Shi-Qiao Wu, Zhi-Kang Lin, Yongyao Li, Jianing Xie

{"title":"Geometry-dependent acoustic higher-order topological phases on a two-dimensional honeycomb lattice","authors":"Shi-Qiao Wu, Zhi-Kang Lin, Yongyao Li, Jianing Xie","doi":"10.1063/5.0202383","DOIUrl":"https://doi.org/10.1063/5.0202383","url":null,"abstract":"Higher-order topological states, as emergent topological phases of matter, originating from condensed matter physics, have sparked a vibrant exploration of topological insulators. Their topologically protected multidimensional localized states are typically associated with nontrivial bulk band topology, and the significant impact of lattice geometry is unconsciously overlooked. Here, we construct coupled acoustic cavities on a two-dimensional honeycomb lattice to investigate the sensitivity of higher-order topological modes to the variations of edge contour. Fractional charge is utilized to accurately predict topological modes with distinct topological orders, in spite of the minimal bulk bandgaps inherent in the honeycomb lattice and bound states in the continuum. It is found that the presence and absence of the first-order and higher-order topological modes in the same topological phase are tightly linked to the sample boundaries, which can be demonstrated by both theoretical analysis and numerical calculation. Our study also discusses potential physical realization of geometry-dependent topological states across different platforms, providing inspiration for the prospective application of topological devices in acoustics.","PeriodicalId":502933,"journal":{"name":"Journal of Applied Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140755982","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0