arXiv - PHYS - Applied Physics最新文献_第8页

The thin lens equation in elasticity: imaging with gradient index phononic crystals 弹性中的薄透镜方程：利用梯度指数声子晶体成像

arXiv - PHYS - Applied Physics Pub Date : 2024-09-03 DOI: arxiv-2409.01964

P. H. Beoletto, F. Nistri, A. S. Gliozzi, N. M. Pugno, F. Bosia

{"title":"The thin lens equation in elasticity: imaging with gradient index phononic crystals","authors":"P. H. Beoletto, F. Nistri, A. S. Gliozzi, N. M. Pugno, F. Bosia","doi":"arxiv-2409.01964","DOIUrl":"https://doi.org/arxiv-2409.01964","url":null,"abstract":"Many works in elasticity have exploited the concept of gradient index (GRIN)\u0000lenses, borrowed from optics, for wave focusing and control. These effects are\u0000particularly attractive for cloaking, absorption or energy harvesting\u0000applications. Despite their potential, current lens designs suffer from\u0000limitations, mainly related to the difficulty in imaging point-like sources.\u0000Here, we exploit an alternative GRIN lens design, which enables a one-to-one\u0000correspondence between input and output phase, and allows to determine the\u0000focal length using the well-known thin lens equation, effectively establishing\u0000the elastic equivalent of the convex lens in optics. This is demonstrated\u0000analytically, obtaining a bijective relation between the location of a\u0000point-like source and its image, and the results are confirmed numerically and\u0000experimentally in an aluminium plate, where the lens is realized by introducing\u0000rows of circular cavities of variable diameters. Moreover, a proof-of-concept\u0000experiment demonstrates the possibility to image sources of flexural waves at\u0000the centimetre scale with subwavelength resolution. This research can extend\u0000applications of elastic GRIN lenses to new fields such as imaging and\u0000non-destructive testing, where the location of defects can be identified by\u0000focusing the scattered field. Multiple sources can be imaged simultaneously,\u0000and the combined effect of multiple lenses can also be used to design more\u0000complex systems, opening new possibilities in the technological exploitation of\u0000elastic wave manipulation.","PeriodicalId":501083,"journal":{"name":"arXiv - PHYS - Applied Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142177810","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

Design and Scalable Synthesis of Thermochromic VO2-Based Coatings for Energy-Saving Smart Windows with Exceptional Optical Performance 设计并可扩展合成基于热致变色 VO2 的涂层，用于具有优异光学性能的节能智能窗

arXiv - PHYS - Applied Physics Pub Date : 2024-09-03 DOI: arxiv-2409.01745

Michal Kaufman, Jaroslav Vlcek, Jiri Houska, Sadoon Farrukh, Stanislav Haviar

{"title":"Design and Scalable Synthesis of Thermochromic VO2-Based Coatings for Energy-Saving Smart Windows with Exceptional Optical Performance","authors":"Michal Kaufman, Jaroslav Vlcek, Jiri Houska, Sadoon Farrukh, Stanislav Haviar","doi":"arxiv-2409.01745","DOIUrl":"https://doi.org/arxiv-2409.01745","url":null,"abstract":"We report strongly thermochromic YSZ/V0.855W0.018Sr0.127O2/SiO2 coatings,\u0000where YSZ is Y stabilized ZrO2, prepared using a scalable deposition technique\u0000on standard glass at a low substrate temperature of 320 {deg}C and without any\u0000substrate bias voltage. The coatings exhibit a transition temperature of 22\u0000{deg}C with an integral luminous transmittance of 63.7% (low-temperature\u0000state) and 60.7% (high-temperature state), and a modulation of the solar energy\u0000transmittance of 11.2%. Such a combination of properties, together with the low\u0000deposition temperature, fulfill the requirements for large-scale implementation\u0000on building glass and have not been reported yet. Reactive high-power impulse\u0000magnetron sputtering with a pulsed O2 flow feedback control allows us to\u0000prepare crystalline W and Sr co-doped VO2 of the correct stoichiometry. The W\u0000doping of VO2 decreases the transition temperature, while the Sr doping of VO2\u0000increases the luminous transmittance significantly. A coating design utilizing\u0000a second-order interference in two antireflection layers is used to maximize\u0000both the integral luminous transmittance and the modulation of the solar energy\u0000transmittance. A compact crystalline structure of the bottom YSZ antireflection\u0000layer further improves the VO2 crystallinity, while the top SiO2 antireflection\u0000layer provides also the mechanical and environmental protection for the\u0000V0.855W0.018Sr0.127O2 layer.","PeriodicalId":501083,"journal":{"name":"arXiv - PHYS - Applied Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142177811","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 novel 3D food printing technique: achieving tunable porosity and fracture properties via liquid rope coiling 新型 3D 食品打印技术：通过液绳卷绕实现可调孔隙率和断裂性能

arXiv - PHYS - Applied Physics Pub Date : 2024-09-02 DOI: arxiv-2409.01487

Aref Ghorbani, Sophia Jennie Giancoli, Seyed Ali Ghoreishy, Martijn Noort, Mehdi Habibi

引用次数: 0

Moisture Diffusion in Multi-Layered Materials: The Role of Layer Stacking and Composition 多层材料中的水分扩散：层堆叠和成分的作用

arXiv - PHYS - Applied Physics Pub Date : 2024-09-02 DOI: arxiv-2409.01150

Shaojie Zhang, Yuhao Liu, Peng Feng, Pavana Prabhakar

{"title":"Moisture Diffusion in Multi-Layered Materials: The Role of Layer Stacking and Composition","authors":"Shaojie Zhang, Yuhao Liu, Peng Feng, Pavana Prabhakar","doi":"arxiv-2409.01150","DOIUrl":"https://doi.org/arxiv-2409.01150","url":null,"abstract":"Multi-layered materials are everywhere, from fiber-reinforced polymer\u0000composites (FRPCs) to plywood sheets to layered rocks. When in service, these\u0000materials are often exposed to long-term environmental factors, like moisture,\u0000temperature, salinity, etc. Moisture, in particular, is known to cause\u0000significant degradation of materials like polymers, often resulting in loss of\u0000material durability. Hence, it is critical to determine the total diffusion\u0000coefficient of multi-layered materials given the coefficients of individual\u0000layers. However, the relationship between a multi-layered material's total\u0000diffusion coefficient and the individual layers' diffusion coefficients is not\u0000well established. Existing parallel and series models to determine the total\u0000diffusion coefficient do not account for the order of layer stacking. In this\u0000paper, we introduce three parameters influencing the diffusion behavior of\u0000multi-layered materials: the ratio of diffusion coefficients of individual\u0000layers, the volume fraction of individual layers, and the stacking order of\u0000individual layers. Computational models are developed within a finite element\u0000method framework to conduct parametric analysis considering the proposed\u0000parameters. We propose a new model to calculate the total diffusion coefficient\u0000of multi-layered materials more accurately than current models. We verify this\u0000parametric study by performing moisture immersion experiments on multi-layered\u0000materials. Finally, we propose a methodology for designing and optimizing the\u0000cross-section of multi-layered materials considering long-term moisture\u0000resistance. This study gives new insights into the diffusion behavior of\u0000multi-layered materials, focusing on polymer composites.","PeriodicalId":501083,"journal":{"name":"arXiv - PHYS - Applied Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142223492","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

Designing high endurance Hf0.5Zr0.5O2 capacitors through engineered recovery from fatigue for non-volatile ferroelectric memory and neuromorphic hardware 通过疲劳恢复工程设计高耐久性 Hf0.5Zr0.5O2 电容器，用于非易失性铁电存储器和神经形态硬件

arXiv - PHYS - Applied Physics Pub Date : 2024-09-01 DOI: arxiv-2409.00635

Xinye Li, Padma Srivari, Sayani Majumdar

{"title":"Designing high endurance Hf0.5Zr0.5O2 capacitors through engineered recovery from fatigue for non-volatile ferroelectric memory and neuromorphic hardware","authors":"Xinye Li, Padma Srivari, Sayani Majumdar","doi":"arxiv-2409.00635","DOIUrl":"https://doi.org/arxiv-2409.00635","url":null,"abstract":"Heavy computational demands from artificial intelligence (AI) leads the\u0000research community to explore the design space for functional materials that\u0000can be used for high performance memory and neuromorphic computing hardware.\u0000Novel device technologies with specially engineered properties are under\u0000intense investigation to revolutionize information processing with\u0000brain-inspired computing primitives for ultra energy-efficient implementation\u0000of AI and machine learning tasks. Ferroelectric memories with ultra-low power\u0000and fast operation, non-volatile data retention and reliable switching to\u0000multiple polarization states promises one such option for non-volatile memory\u0000and synaptic weight elements in neuromorphic hardware. For quick adaptation of\u0000industry, new materials need complementary metal oxide semiconductor (CMOS)\u0000process compatibility which brings a whole new set of challenges and\u0000opportunities for advanced materials design. In this work, we report on\u0000designing of back-end-of-line compatible ferroelectric Hf0.5Zr0.5O2 capacitors\u0000that are capable of recovery from fatigue multiple times reaching 2Pr > 40\u0000microC cm-2 upon each retrieval. Our results indicate that with specifically\u0000engineered material stack and annealing protocols, it is possible to reach\u0000endurance exceeding 10^9 cycles at room temperature that can lead to ultralow\u0000power ferroelectric non-volatile memory components or synaptic weight elements\u0000compatible with online training or inference tasks for neuromorphic computing.","PeriodicalId":501083,"journal":{"name":"arXiv - PHYS - Applied Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142177829","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

Ultrafast manipulations of nanoscale skyrmioniums 纳米级天铱的超快操作

arXiv - PHYS - Applied Physics Pub Date : 2024-09-01 DOI: arxiv-2409.00683

Haiming Dong, Panpan Fu, Yifeng Duan, Kai Chang

引用次数: 0

>3kV NiO/Ga2O3 Heterojunction Diodes with Space-Modulated Junction Termination Extension and Sub-1V Turn-on 具有空间调制结终端扩展和低于 1V 接通电压的 >3kV NiO/Ga2O3 异质结二极管

arXiv - PHYS - Applied Physics Pub Date : 2024-08-31 DOI: arxiv-2409.00344

Advait Gilankar, Abishek Katta, Nabasindhu Das, Nidhin Kurian Kalarickal

引用次数: 0

Spin filtering with insulating altermagnets 使用绝缘反向磁铁进行自旋过滤

arXiv - PHYS - Applied Physics Pub Date : 2024-08-30 DOI: arxiv-2409.00195

Kartik Samanta, Ding-Fu Shao, Evgeny Y. Tsymbal

{"title":"Spin filtering with insulating altermagnets","authors":"Kartik Samanta, Ding-Fu Shao, Evgeny Y. Tsymbal","doi":"arxiv-2409.00195","DOIUrl":"https://doi.org/arxiv-2409.00195","url":null,"abstract":"Altermagnetic (AM) materials have recently attracted significant interest due\u0000to the non-relativistic momentum-dependent spin splitting of their electronic\u0000band structure which may be useful for antiferromagnetic (AFM) spintronics. So\u0000far, however, most research studies have been focused on AM metals which can be\u0000utilized in spintronic devices, such as AFM tunnel junctions (AFMTJs). At the\u0000same time, AM insulators have remained largely unexplored in the realm of AFM\u0000spintronics. Here, we propose to employ AM insulators (AMIs) as efficient\u0000spin-filter materials. By analyzing the complex band structure of rutile-type\u0000altermagnets $MF_2$ ($M$ = $Fe, Co, Ni$), we demonstrate that the evanescent\u0000states in these AMIs exhibit spin- and momentum-dependent decay rates resulting\u0000in a substantial momentum-dependent spin polarization of the tunneling current.\u0000Using a model of spin-filter tunneling across a spin-dependent potential\u0000barrier, we estimate the TMR effect in spin-filter magnetic tunnel junctions\u0000(SF-MTJs) that include two magnetically decoupled $MF_2$ (001) barrier layers.\u0000We predict a sizable spin-filter TMR ratio of about 150-170% in SF-MTJs based\u0000on AMIs $CoF_2$ and $NiF_2$ if the Fermi energy is tuned to be close to the\u0000valence band maximum. Our results demonstrate that AMIs provide a viable\u0000alternative to conventional ferromagnetic or ferrimagnetic spin-filter\u0000materials, potentially advancing the development of next-generation AFM\u0000spintronic devices.","PeriodicalId":501083,"journal":{"name":"arXiv - PHYS - Applied Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142177830","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

Suspended lithium niobate acoustic resonators with buried electrodes for radiofrequency filtering 用于射频滤波的带埋入式电极的悬浮式铌酸锂声共振器

arXiv - PHYS - Applied Physics Pub Date : 2024-08-30 DOI: arxiv-2408.17282

Silvan Stettler, Luis Guillermo Villanueva

引用次数: 0

Highly Efficient and Stable Perovskite Solar Cells via MultiFunctional Curcumin Modified Buried Interface 通过多功能姜黄素修饰的埋藏界面实现高效稳定的 Perovskite 太阳能电池

arXiv - PHYS - Applied Physics Pub Date : 2024-08-30 DOI: arxiv-2408.17167

Xianhu Wu, Jieyu Bi, Guanglei Cu, Nian Liu, Gaojie Xia, Jilong Sun, Jiaxin Jiang, Ning Lu, Ping Li, Chunyi Zhao, Zewen Zuo, Min Gu

{"title":"Highly Efficient and Stable Perovskite Solar Cells via MultiFunctional Curcumin Modified Buried Interface","authors":"Xianhu Wu, Jieyu Bi, Guanglei Cu, Nian Liu, Gaojie Xia, Jilong Sun, Jiaxin Jiang, Ning Lu, Ping Li, Chunyi Zhao, Zewen Zuo, Min Gu","doi":"arxiv-2408.17167","DOIUrl":"https://doi.org/arxiv-2408.17167","url":null,"abstract":"The buried interface between the electron transport layer and the perovskite\u0000layer suffers from severe interface defects and imperfect energy level\u0000alignment. To address this issue, this study employs a multifunctional organic\u0000molecule, curcumin, to modify the interface between SnO2 and the perovskite\u0000layer. The functional groups on curcumin effectively passivate the defects on\u0000both sides of the interface, reducing -OH and oxygen vacancy defects on the\u0000SnO2 surface and passivating uncoordinated Pb2+ in the perovskite layer. This\u0000results in a more compatible energy level alignment and lower defect density at\u0000the interface, enhancing carrier transport across it. Consequently, the devices\u0000based on curcumin achieve an impressive champion power conversion efficiency\u0000(PCE) of 24.46%, compared to 22.03% for control devices. This work demonstrates\u0000a simple, green, hydrophobic, and efficient molecular modification method for\u0000the buried interface, laying the foundation for the development of\u0000high-performance and stable perovskite solar cells.","PeriodicalId":501083,"journal":{"name":"arXiv - PHYS - Applied Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142177835","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