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Enhancing Defect-Induced Dipole Polarization Strategy of SiC@MoO_(3)Nanocomposite Towards Electromagnetic Wave Absorption
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作者 Ting Wang Wenxin Zhao +8 位作者 Yukun Miao Anguo Cui Chuanhui Gao Chang Wang Liying Yuan Zhongning Tian Alan Meng Zhenjiang Li Meng Zhang 《Nano-Micro Letters》 SCIE EI CAS CSCD 2024年第12期406-426,共21页
Defect engineering in transition metal oxides semiconductors(TMOs)is attracting considerable interest due to its potential to enhance conductivity by intentionally introducing defects that modulate the electronic stru... Defect engineering in transition metal oxides semiconductors(TMOs)is attracting considerable interest due to its potential to enhance conductivity by intentionally introducing defects that modulate the electronic structures of the materials.However,achieving a comprehensive understanding of the relationship between micro-structures and electromagnetic wave absorption capabilities remains elusive,posing a substantial challenge to the advancement of TMOs absorbers.The current research describes a process for the deposition of a MoO_(3)layer onto SiC nanowires,achieved via electro-deposition followed by high-temperature calcination.Subsequently,intentional creation of oxygen vacancies within the MoO_(3)layer was carried out,facilitating the precise adjustment of electromagnetic properties to enhance the microwave absorption performance of the material.Remarkably,the SiC@MO-t4 sample exhibited an excellent minimum reflection loss of-50.49 dB at a matching thickness of 1.27 mm.Furthermore,the SiC@MO-t6 sample exhibited an effective absorption bandwidth of 8.72 GHz with a thickness of 2.81 mm,comprehensively covering the entire Ku band.These results not only highlight the pivotal role of defect engineering in the nuanced adjustment of electromagnetic properties but also provide valuable insight for the application of defect engineering methods in broadening the spectrum of electromagnetic wave absor ption effectiveness.SiC@MO-t samples with varying concentrations of oxygen vacancies were prepared through in-situ etching of the SiC@MoO_(3)nanocomposite.The presence of oxygen vacancies plays a crucial role in adjusting the band gap and local electron distribution,which in turn enhances conductivity loss and induced polarization loss capacity.This finding reveals a novel strategy for improving the absorption properties of electromagnetic waves through defect engineering. 展开更多
关键词 Defect engineering Oxygen vacancies SiC@MoO_(3)nanocomposite Electromagnetic wave absorption Induced dipole polarization
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Induced dipole dominant giant electrorheological fluid 被引量:1
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作者 沈容 陆坤权 +1 位作者 邱昭晖 熊小敏 《Chinese Physics B》 SCIE EI CAS CSCD 2023年第7期548-557,共10页
Traditional dielectric electrorheological fluid(ER)is based on the interaction of dielectric particle polarization,and the yield stress is low,which cannot meet the application requirements.The giant ER(GER)effect is ... Traditional dielectric electrorheological fluid(ER)is based on the interaction of dielectric particle polarization,and the yield stress is low,which cannot meet the application requirements.The giant ER(GER)effect is caused by orientations and interactions of polar molecules adsorbed on the particle surfaces.Despite the high yield stress,these polar molecules are prone to wear and fall off,resulting in a continuous reduction in shear stress of GER liquid,which is also not suitable for application.Here we introduce a new type of ER fluid called induced dipole dominant ER fluid(ID-ER),of which the particles contain oxygen vacancies or conductor microclusters both prepared by high energy ball milling(HEBM)technique.In the electric field E,oxygen vacancies or conductor microclusters form induced dipoles.Because the local electric field E_(loc) in the gaps between particles can be two to three orders of magnitude larger than E,the induced dipole moments must be large.The strong interactions of these induced dipoles make the yield stress of the ID-ER fluid reaching more than 100 kPa.Since there are oxygen vacancies or conductor microclusters everywhere in the particles,the particles will not lose the function due to surface wear during use.The experimental results show that the ID-ER fluid possesses the advantages of high shear stress,low current density,short response time,good temperature stability,long service life,and anti-settlement,etc.The comprehensive performance is much better than the existing ER materials,and also the preparation method is simple and easy to repeat,thus it should be a new generation of ER fluid suitable for practical applications. 展开更多
关键词 electrorheological fluid induced dipole VACANCIES high energy ball milling
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Hybrid of Quantum Phases for Induced Dipole Moments
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作者 马凯 《Chinese Physics Letters》 SCIE CAS CSCD 2016年第9期14-16,共3页
The quantum phase effects for induced electric and magnetic dipole moments are investigated. It is shown that the phase shift received by the induced electric dipole has the same form as the one induced by magnetic di... The quantum phase effects for induced electric and magnetic dipole moments are investigated. It is shown that the phase shift received by the induced electric dipole has the same form as the one induced by magnetic dipole moment, therefore the total phase is a hybrid of these two types of phase. This feature indicates that to have a decisive measurement on either one of these two phases, it is necessary to measure the velocity dependence of the observed phase. 展开更多
关键词 for in AS of Hybrid of Quantum Phases for Induced dipole Moments that been IS
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Simulation of anyons by cold atoms with induced electric dipole moment
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作者 Jian Jing Yao-Yao Ma +2 位作者 Qiu-Yue Zhang Qing Wang Shi-Hai Dong 《Chinese Physics B》 SCIE EI CAS CSCD 2020年第8期157-161,共5页
We show that it is possible to simulate an anyon by a trapped atom which possesses an induced electric dipole moment in the background of electric and magnetic fields in a specific configuration.The electric and magne... We show that it is possible to simulate an anyon by a trapped atom which possesses an induced electric dipole moment in the background of electric and magnetic fields in a specific configuration.The electric and magnetic fields we applied contain a magnetic and two electric fields.We find that when the atom is cooled down to the limit of the negligibly small kinetic energy,the atom behaves like an anyon because its angular momentum takes fractional values.The fractional part of the angular momentum is determined by both the magnetic and one of the electric fields.Roles electric and magnetic fields played are analyzed. 展开更多
关键词 ANYONS cold atoms induced electric dipole moment
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Tunable left-hand characteristics in multi-nested square-split-ring enabled metamaterials
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作者 ABDULKARIM Yadgar.I DENG Lian-wen +5 位作者 YANG Jun-liang COLAK Sule KARAASLAN Muharrem HUANG Sheng-xiang HE Long-hui LUO Heng 《Journal of Central South University》 SCIE EI CAS CSCD 2020年第4期1235-1246,共12页
Left-hand materials have drawn increasing attention from many disciplines and found widespread application, especially in microwave engineering. A sandwiched metamaterial consisting of multi-nested square-split-ring r... Left-hand materials have drawn increasing attention from many disciplines and found widespread application, especially in microwave engineering. A sandwiched metamaterial consisting of multi-nested square-split-ring resonators on the top side and a set of wires on the back side is proposed. Scattering parameters are retrieved by high-frequency structure simulator(HFSS) software based on the finite element method. Effects of square-split-ring number on the left-hand characteristics containing negative values of permittivity, permeability, and refractive index have been intensively investigated. Simulated results show that obvious resonant left-hand characteristics could be observed within 8-18 GHz, and the resonant frequency counts are inclined to be in direct proportion to the square-split-ring number over 8-18 GHz. Besides, the proposed sandwiched metamaterial with three square-split-ring resonators and three wires presents the widest frequency band of left-hand characteristics in a range of 8-18 GHz. Further, electromagnetic field distributions demonstrated that the induced magnetic dipole dominates the resonant absorption. The multi-peak resonance characteristics of square-split-ring resonant structure are considered to be a promising candidate for selective-frequency absorption or modulation toward microwave frequency band. 展开更多
关键词 METAMATERIAL square-split-ring negative permittivity induced magnetic dipole
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Multipartite entanglement generation with dipole induced transparency effect in indirectly coupled dipole-microcavity systems 被引量:1
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作者 Zhaohui Peng Chunxia aia +2 位作者 Yuqing Zhang Zhonghua Zhu Xiaojuan Liu 《Chinese Optics Letters》 SCIE EI CAS CSCD 2018年第8期75-79,共5页
We propose a feasible scheme of generating multipartite entanglement with the dipole induced transparency (D/T) effect in indirectly coupled dipole-microcavity systems. It is shown that the transmission spectrum is ... We propose a feasible scheme of generating multipartite entanglement with the dipole induced transparency (D/T) effect in indirectly coupled dipole-microcavity systems. It is shown that the transmission spectrum is closely related with the interference of dipole-microcavity systems, and we can generate different classes of multi- partite entanglement, e.g., the Greenberger-Horne-Zeilinger state, the W state, and the Dicke state, of the di- pole emitters just by choosing an appropriate frequency of the incident photon. Benefiting from the DIT effect, the schemes may work in the bad or low-Q cavity regime only if the large Purcell factor of the dipole-microcavity system is fulfilled, and they are also insensitive to experimental noise, which may be feasible with present acces- sible technology. 展开更多
关键词 Multipartite entanglement generation with dipole induced transparency effect in indirectly coupled dipole-microcavity systems DIT QED
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