AIP Advances最新文献_第5页

Low dark current Sb-based short-wavelength infrared photodetector 低暗电流锑基短波长红外光探测器

IF 1.6 4区物理与天体物理

AIP Advances Pub Date : 2024-09-09 DOI: 10.1063/5.0207138

Mingming Li, Yifan Cheng, Xiangyu Zhang, Ye Zhang, Dongwei Jiang, Zhigang Song, Wanhua Zheng

引用次数: 0

Deflection characteristics and influencing factors of projectile oblique impact on concrete targets 弹丸斜向冲击混凝土目标时的变形特性和影响因素

IF 1.6 4区物理与天体物理

AIP Advances Pub Date : 2024-09-09 DOI: 10.1063/5.0220438

Xiangyu Xu, Xigui Tao, Yingxiang Wu, Yunke Lu, Yan Liu, Ji Zhang, Yushuai Zhang

{"title":"Deflection characteristics and influencing factors of projectile oblique impact on concrete targets","authors":"Xiangyu Xu, Xigui Tao, Yingxiang Wu, Yunke Lu, Yan Liu, Ji Zhang, Yushuai Zhang","doi":"10.1063/5.0220438","DOIUrl":"https://doi.org/10.1063/5.0220438","url":null,"abstract":"The projectile deflects and even ricochets after an oblique impact on the concrete. However, research on the oblique impact of projectiles on concrete targets mainly focuses on oblique penetration and the critical ricochet angle, and there are few experimental studies on ricochets. Deflection and its influencing factors remain undefined. This study conducted experiments and LS-DYNA numerical simulations on projectiles obliquely impacting C60 concrete targets. The experimental research visually revealed deflection and ricochet phenomena after the oblique impact. The ricochet caused by large-angle impacts can effectively reduce the damaged area of concrete targets. Subsequently, the main governing parameters affecting the deflection angle of the projectile were identified through dimensional analysis, and a sensitivity analysis was performed on these parameters using an orthogonal experimental design. On this basis, the influence of the incident angle, impact velocity, and projectile length-to-diameter ratio on the projectile deflection was further clarified. The results showed that the maximum deflection angle was achieved when a 30 mm caliber projectile obliquely impacted a C60 concrete at an incident angle of ∼45°. In the case of ricochets, the deflection angle increased with an increase in the impact velocity and decreased with an increase in the length-to-diameter ratio. This study aids in predicting and controlling projectile deflection and provides a reference for the innovative design of concrete protective structures.","PeriodicalId":7619,"journal":{"name":"AIP Advances","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142224434","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design of wireless charging system for E-Vehicle 为电动汽车设计无线充电系统

IF 1.6 4区物理与天体物理

AIP Advances Pub Date : 2024-09-09 DOI: 10.1063/5.0218429

Shweta L. Tiwari, S. R. Gaigowal, Kiran Raut

{"title":"Design of wireless charging system for E-Vehicle","authors":"Shweta L. Tiwari, S. R. Gaigowal, Kiran Raut","doi":"10.1063/5.0218429","DOIUrl":"https://doi.org/10.1063/5.0218429","url":null,"abstract":"To address the dual problems of fuel reliance and air pollution, this study describes the design of a wireless ground to vehicle charging system powered by solar energy and specifically designed for electric vehicle (EV) charging stations. As the number of electric vehicles on the road steadily rises, they present a viable way to cut travel expenses by switching from conventional fuel to electricity, which is a more economical and sustainable option. With the introduction of a wireless EV charging system, this creative solution does away with the need for external power sources and permits continuous charging without interfering with driving. Utilizing solar power, the charging system incorporates solar panels, batteries, circuit regulators, boost converters, receiver and transmitter copper coils, AC/DC converters, microcontrollers (such as ATmega), LCD screens, and circuit regulators. This study describes a technique that shows that charging electric cars while driving is feasible and eliminates the need to stop. This technology for wireless solar electric vehicle charging presents a forward-thinking approach to sustainable mobility by providing a workable solution that can be easily included in the road infrastructure. For the wireless charging, in addition, various coil designs are suggested.","PeriodicalId":7619,"journal":{"name":"AIP Advances","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142185399","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

On the use of reactive multiparticle collision dynamics to gather particulate level information from simulations of epidemic models 利用反应多粒子碰撞动力学从流行病模型模拟中收集粒子水平信息

IF 1.6 4区物理与天体物理

AIP Advances Pub Date : 2024-09-09 DOI: 10.1063/5.0223361

Zaib Un Nisa Memon, Katrin Rohlf

{"title":"On the use of reactive multiparticle collision dynamics to gather particulate level information from simulations of epidemic models","authors":"Zaib Un Nisa Memon, Katrin Rohlf","doi":"10.1063/5.0223361","DOIUrl":"https://doi.org/10.1063/5.0223361","url":null,"abstract":"This paper discusses the application of reactive multiparticle collision (RMPC) dynamics, a particle-based method, to epidemic models. First, we consider a susceptible-infectious-recovered framework to obtain data on contacts of susceptibles with infectious people in a population. It is found that the number of contacts increases and the contact duration decreases with increases in the disease transmission rate and average population speed. Next, we obtain reinfection statistics for a general infectious disease from RMPC simulations of a susceptible-infectious-recovered-susceptible model. Finally, we simulate a susceptible-exposed-infectious-recovered model and gather the exposure, infection, and recovery time for the individuals in the population under consideration. It is worth mentioning that we can collect data in the form of average contact duration, average initial infection time, etc., from RMPC simulations of these models, which is not possible with population-based stochastic models, or deterministic systems. This study provides quantitative insights on the potential of RMPC to simulate epidemic models and motivates future efforts for its application in the field of mathematical epidemiology.","PeriodicalId":7619,"journal":{"name":"AIP Advances","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142224435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced magnetoresistance induced collaboratively by spin and orbital currents 自旋电流和轨道电流共同诱导增强磁阻

IF 1.6 4区物理与天体物理

AIP Advances Pub Date : 2024-09-06 DOI: 10.1063/5.0231164

Shuyi Yang, Jinnan Liu, Huan Liu, Yongji Li, Wei Zhang, Zhongming Zeng, Zhiyong Quan

{"title":"Enhanced magnetoresistance induced collaboratively by spin and orbital currents","authors":"Shuyi Yang, Jinnan Liu, Huan Liu, Yongji Li, Wei Zhang, Zhongming Zeng, Zhiyong Quan","doi":"10.1063/5.0231164","DOIUrl":"https://doi.org/10.1063/5.0231164","url":null,"abstract":"Orbital currents in light metals or metal oxides without the strong spin–orbit coupling have become an important means to achieve low-power magnetization switching in spin–orbitronic devices. The orbital magnetoresistance (OMR) originated from orbital current represents a useful strategy to explore the interaction between the orbital angular momentum (OAM) and the local magnetic moment. However, systematic research works on the enhancement of OMR and the mechanism of OAM transport are seldom reported. In this study, we report a synergistically enhanced magnetoresistance effect induced by spin and orbital currents in perpendicularly magnetized Pt/Co/Cu–CuOx systems. A maximum room temperature magnetoresistance of 0.38% was observed, exceeding the spin Hall magnetoresistance (SMR) of heavy metal-based heterostructures by one order of magnitude. The enhancement of magnetoresistance is attributed to the contributions from the OMR generated by the orbital Rashba effect at the Cu/CuOx interface and SMR induced by the spin Hall effect in heavy metal Pt. These results provide a pathway to understanding of the OAM transport in magnetic multilayer films and contribute to the design and realization of energy-efficient spin–orbitronic devices.","PeriodicalId":7619,"journal":{"name":"AIP Advances","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142224284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design of an X-band high efficiency coaxial relativistic backward wave oscillator with permanent magnetic package 设计带永磁封装的 X 波段高效同轴相对论后向波振荡器

IF 1.6 4区物理与天体物理

AIP Advances Pub Date : 2024-09-06 DOI: 10.1063/5.0223711

Kaiqi Yang, Fugui Zhou, Dian Zhang, Zhenxing Jin, Yujie Xiang, Tengfang Wang, Wei Zhang

引用次数: 0

Symmetry change of quantum electron solids in double layer MoS2 双层 MoS2 中量子电子固体的对称性变化

IF 1.6 4区物理与天体物理

AIP Advances Pub Date : 2024-09-06 DOI: 10.1063/5.0223186

S. T. Chui, Meizhen Huang, Zefei Wu, Ning Wang

{"title":"Symmetry change of quantum electron solids in double layer MoS2","authors":"S. T. Chui, Meizhen Huang, Zefei Wu, Ning Wang","doi":"10.1063/5.0223186","DOIUrl":"https://doi.org/10.1063/5.0223186","url":null,"abstract":"Electrons in transition metal dichalcogenides stacked on opposite sides of BN of thickness d can form solids, which have no long range position order but are characterized by a finite shear modulus. The melting temperature Tm is characterized by the occurrence of unbound quantum topological defects. Tm of this solid is four orders of magnitude larger than that of previously studied electron solids in Si-MOSFETs. As the density n = n0 × 1012/cm2 is changed so that both the top and the bottom electron densities are the same, for n0 &gt; 1.5 with d = 5 nm, a hexagonal solid is manifested experimentally by a five order of magnitude increase in Coulomb drag resistance Rdrag at room temperature. This resistance change corresponds to a four orders of magnitude better subthreshold slope, the key parameter for semiconductor device low power switching, over existing limits for MOSFETs from “Boltzmann’s tyranny.” The symmetry of the two-layer solid can be tuned by varying the density. The hexagonal lattice becomes soft at n0 ≈ 1.5. There is a further two orders of magnitude increase in Rdrag due to an increase in disorder caused by the large quantum fluctuation of the lattice position that is of 0.4 order of the lattice spacing. The subthreshold slope is improved by two more orders of magnitude. For n0 &lt; 1.5, different phases of the solid corresponding to peaks of Rdrag of different magnitude at different gate voltages start to form. This raises the intriguing possibility of making new classes of devices with ternary and higher order systems where the different phases correspond to different logical states and not just two states of on (low resistance) and off (high resistance).","PeriodicalId":7619,"journal":{"name":"AIP Advances","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142224282","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Graphene–insulator–metal diodes: Enhanced dielectric strength of the Al2O3 barrier 石墨烯-绝缘体-金属二极管：增强 Al2O3 势垒的介电强度

IF 1.6 4区物理与天体物理

AIP Advances Pub Date : 2024-09-06 DOI: 10.1063/5.0223763

J. Kunc, T. Fridrišek, M. Shestopalov, J. Jo, K. Park

{"title":"Graphene–insulator–metal diodes: Enhanced dielectric strength of the Al2O3 barrier","authors":"J. Kunc, T. Fridrišek, M. Shestopalov, J. Jo, K. Park","doi":"10.1063/5.0223763","DOIUrl":"https://doi.org/10.1063/5.0223763","url":null,"abstract":"We studied the transport properties of graphene–insulator–metal tunneling diodes. Two sets of tunneling diodes with Ti–Cu and Cr–Au top contacts are fabricated. Transport measurements showed state-of-the-art non-linearity and a critical influence of the top metals on the dielectric strength of the tunneling barrier. X-ray photoelectron spectroscopy indicated two methods for enhancing the dielectric strength of the tunneling barrier. These are the optimized seed layers for the growth of high-quality conformal insulators and the selection of appropriate top metal layers with a small diffusion coefficient and electromigration into the Al2O3 barrier. The Cr–Au top contact provides superior characteristics to the Ti–Cu metallization. X-ray photoelectron spectroscopy showed significant diffusion of titanium during the Al2O3 growth and the formation of titanium inclusions after annealing. Chromium diffusion is slower than that of titanium, making chromium contact more suitable for the reliable operation of tunneling diodes. As a result, we demonstrate a 40% improvement in the dielectric strength of the tunneling barrier compared to state-of-the-art metal–insulator–metal diodes.","PeriodicalId":7619,"journal":{"name":"AIP Advances","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142185400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Unfolding band structure and topological property of 3d transition metal doped monolayer CrTe2: A first-principle calculation 掺杂 3d 过渡金属的单层 CrTe2 的展开带结构和拓扑特性：第一原理计算

IF 1.6 4区物理与天体物理

AIP Advances Pub Date : 2024-09-06 DOI: 10.1063/5.0225476

Pengfei Yan, Guanqi Li, Zhihao Li, Yafei Zhao, Liang He

引用次数: 0

An upconversion device based on high-performance dual-layer white organic electroluminescent devices 基于高性能双层白色有机电致发光器件的上转换装置

IF 1.6 4区物理与天体物理

AIP Advances Pub Date : 2024-09-06 DOI: 10.1063/5.0222205

Weigao Wang, Yiyang Li, Yili Wan, Yu Duan, Hua An, Zhengchun Peng

{"title":"An upconversion device based on high-performance dual-layer white organic electroluminescent devices","authors":"Weigao Wang, Yiyang Li, Yili Wan, Yu Duan, Hua An, Zhengchun Peng","doi":"10.1063/5.0222205","DOIUrl":"https://doi.org/10.1063/5.0222205","url":null,"abstract":"Large-area imaging techniques in the short-wave infrared spectral region remain a pressing need. Organic light-emitting diodes and infrared photodetectors can be combined to form a near-infrared (NIR) to visible upconversion device, which has great potential to replace traditional infrared imaging systems. The integration of a white organic light-emitting diode (WOLED) with infrared photodetectors has become essential to realize full-color displays for its simple preparation process and high compatibility. This work has designed and optimized a WOLED to achieve stable emission with high brightness (19 470 cd m−2) and high external quantum efficiency (EQE = 18.08%) at a wide voltage range, thereby reducing chromaticity drift caused by voltage fluctuations. Moreover, photon-generated holes in the NIR-sensitive photodetector are able to inject into the WOLED for visible light emission. Consequently, we have obtained a high-performance upconversion device with a luminance on-off ratio exceeding 5 × 103 at 850 nm NIR and a high color stability over a wide range of operating voltage. Our efforts have accomplished a high-performance upconversion device from NIR to white visible light, laying the groundwork for a preliminary exploration of full-color displays.","PeriodicalId":7619,"journal":{"name":"AIP Advances","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142185409","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0