Journal of Physics D: Applied Physics最新文献_第8页

Facile synthesis and characterization of Cu2Se thin films and self-powered p-Cu2Se/n-Si heterojunction with high-performance photoresponse Cu2Se 薄膜和具有高性能光响应的自供电 p-Cu2Se/n-Si 异质结的简易合成与表征

IF 3.4 3区物理与天体物理

Journal of Physics D: Applied Physics Pub Date : 2024-08-06 DOI: 10.1088/1361-6463/ad687c

Der-Yuh Lin, Yu-Tai Shih, De-Jin Qiu, Yee-Mou Kao, Sheng-Beng Hwang, Ming-Cheng Kao and Chia-Feng Lin

{"title":"Facile synthesis and characterization of Cu2Se thin films and self-powered p-Cu2Se/n-Si heterojunction with high-performance photoresponse","authors":"Der-Yuh Lin, Yu-Tai Shih, De-Jin Qiu, Yee-Mou Kao, Sheng-Beng Hwang, Ming-Cheng Kao and Chia-Feng Lin","doi":"10.1088/1361-6463/ad687c","DOIUrl":"https://doi.org/10.1088/1361-6463/ad687c","url":null,"abstract":"A facile, cost-effective, and scalable chemical vapor deposition technique was used to synthesize p-type Cu2Se thin films on glass and n-type Si substrates. Thorough characterization confirmed the films’ β-phase structure with the correct stoichiometric ratio and exceptional crystalline quality, exhibiting behavior akin to a degenerate semiconductor. Measurements unveiled a work function of 4.83 eV and a bandgap of 2.13 eV for Cu2Se. The fabrication of a p-Cu2Se/n-Si heterojunction was achieved by depositing the p-type Cu2Se thin film onto the n-type Si substrate. The resulting heterostructure displayed rectification behavior, and its energy band diagram resembled a Schottky diode. Further exploration into its photoelectric properties showcased the p-Cu2Se/n-Si heterostructure’s favorable self-powered attribute, characterized by fast, steady, reproducible, sensitive, and robust photoresponsive performance. Consequently, it proves highly suitable for applications in high-frequency photodetectors. Additionally, the p-Cu2Se/n-Si heterojunction’s photovoltaic power conversion efficiency exceeded the reported values of the CuO/Si and Cu2O/Si systems. Here, this study contributes significantly to the pivotal evaluation of p-Cu2Se/n-Si heterostructures for promising optoelectronic applications.","PeriodicalId":16789,"journal":{"name":"Journal of Physics D: Applied Physics","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141943714","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 modes of nanosecond pulsed plasmas for combustion ignition of quiescent CH4-air mixtures 纳秒脉冲等离子体在静态 CH4 空气混合物燃烧点火中的应用模式

IF 3.4 3区物理与天体物理

Journal of Physics D: Applied Physics Pub Date : 2024-08-05 DOI: 10.1088/1361-6463/ad6876

Chunqi Jiang, Akash C Dhotre, Meimei Lai, Sayan Biswas, James R MacDonald and Isaac W Ekoto

引用次数: 0

Floquet-engineered valley topotronics in Kekulé-Y bond textured graphene superlattice Kekulé-Y 键纹理石墨烯超晶格中的浮凸工程谷拓扑技术

IF 3.4 3区物理与天体物理

Journal of Physics D: Applied Physics Pub Date : 2024-08-01 DOI: 10.1088/1361-6463/ad5e90

Sushmita Saha, Alestin Mawrie

{"title":"Floquet-engineered valley topotronics in Kekulé-Y bond textured graphene superlattice","authors":"Sushmita Saha, Alestin Mawrie","doi":"10.1088/1361-6463/ad5e90","DOIUrl":"https://doi.org/10.1088/1361-6463/ad5e90","url":null,"abstract":"The exquisite distortion in a Kekulé -Y (Kek-Y) superlattice merges the two inequivalent Dirac cones (from the <italic toggle=\"yes\">K</italic>- and the <italic toggle=\"yes\">K</italic>′- points) into the highest symmetric Γ-point in the hexagonal Brillouin zone. Here, we report that UV circularly polarized light not only opens up a topological gap at the Γ-point, but also lifts the valley degeneracy at that point. Endowed with Floquet dynamics and by devising a scheme of high-frequency approximation, we propose that the left/right-handedness in polarized light offers the possibility to realize valley-selective circular dichroism in a Kek-Y-shaped graphene superlattice. In addition, the non-vanishing Berry curvature and enumeration of the valley-resolved Chern number <inline-formula>\u0000<tex-math><?CDATA $mathcal{C}_{K}/mathcal{C}_{K^{prime}} = +1/-1$?></tex-math>\u0000<mml:math overflow=\"scroll\"><mml:mrow><mml:msub><mml:mrow><mml:mi>C</mml:mi></mml:mrow><mml:mrow><mml:mi>K</mml:mi></mml:mrow></mml:msub><mml:mrow><mml:mo>/</mml:mo></mml:mrow><mml:msub><mml:mrow><mml:mi>C</mml:mi></mml:mrow><mml:mrow><mml:msup><mml:mi>K</mml:mi><mml:mi>′</mml:mi></mml:msup></mml:mrow></mml:msub><mml:mo>=</mml:mo><mml:mo>+</mml:mo><mml:mn>1</mml:mn><mml:mrow><mml:mo>/</mml:mo></mml:mrow><mml:mo>−</mml:mo><mml:mn>1</mml:mn></mml:mrow></mml:math>\u0000<inline-graphic xlink:href=\"dad5e90ieqn1.gif\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula> enable us to assign two pseudospin flavors (up/down) with the two valleys. Thereby, the above observations confirm the topological transition, suggesting the ease of realizing the valley quantum anomalous Hall state within the photon-dressed Kek-Y. These findings further manifest a non-zero optical valley polarization that is maximal at the Γ-point. Our paper thus proposes an optically switchable topological valley filter, which is desired in the evolving landscape of valleytronics.","PeriodicalId":16789,"journal":{"name":"Journal of Physics D: Applied Physics","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141872973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Deformation theory and nonlinear dynamic behavior of PVC gel actuators 聚氯乙烯凝胶致动器的变形理论和非线性动态行为

IF 3.4 3区物理与天体物理

Journal of Physics D: Applied Physics Pub Date : 2024-07-29 DOI: 10.1088/1361-6463/ad6455

Zhuoao Du, Bin Luo, Zhigang Chen, Meiyu Zhu, Kejun Zhu, Yanjie Wang

{"title":"Deformation theory and nonlinear dynamic behavior of PVC gel actuators","authors":"Zhuoao Du, Bin Luo, Zhigang Chen, Meiyu Zhu, Kejun Zhu, Yanjie Wang","doi":"10.1088/1361-6463/ad6455","DOIUrl":"https://doi.org/10.1088/1361-6463/ad6455","url":null,"abstract":"Polyvinyl chloride (PVC) gel generates complex nonlinear vibration behavior under an alternating current voltage excitation, which has potential application as a dynamic electromechanical actuator. However, there are few studies on the deformation theory of PVC gel actuators, especially the dynamic nonlinear response theory. In this paper, a complex dynamic model is established according to the electrodeformation mechanism of PVC film, and the nonlinear dynamic behavior of the actuator is numerically studied by a differential equation. The effects of applied voltage amplitude, voltage frequency, dibutyl adipate content, mechanical tension, and bias voltage on the dynamic properties of PVC film were analyzed under the condition of equal biaxial tension. The variation of amplitude and the generation and disappearance of the beat frequency during vibration are analyzed by using time-domain characteristics. The degree of PVC actuator nonlinearity as well as vibration stability and periodicity is also reflected based on the phase path and Poincare map. Finally, the law of influence of external condition parameters on the dynamic response of the PVC actuator is obtained.","PeriodicalId":16789,"journal":{"name":"Journal of Physics D: Applied Physics","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141864410","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Study on the effect of heat treatment on the structure, mechanical and electrical properties of alumina fiber insulation 研究热处理对氧化铝纤维绝缘层的结构、机械和电气性能的影响

IF 3.4 3区物理与天体物理

Journal of Physics D: Applied Physics Pub Date : 2024-07-25 DOI: 10.1088/1361-6463/ad6456

Li Xie, Yongjin Han and Yang Huang

{"title":"Study on the effect of heat treatment on the structure, mechanical and electrical properties of alumina fiber insulation","authors":"Li Xie, Yongjin Han and Yang Huang","doi":"10.1088/1361-6463/ad6456","DOIUrl":"https://doi.org/10.1088/1361-6463/ad6456","url":null,"abstract":"In this paper, the heat treatment of alumina fiber was studied. The infiltration agent on the fiber surface was removed after heat treatment at 450 °C for 6 h. TG-DSC, scanning electron microscope, x-ray diffraction, Fourier infrared spectrometer, energy dispersive spectrometer, and patterning were used to analyze the thermal weight loss, fiber surface morphology, crystal structure, and composition of alumina fibers. The results show that the aluminum oxide fiber has excellent temperature resistance and does not undergo crystal phase transformation during thermal weight loss. After heat treatment, the fiber surface infiltration agent ablates and dissolves from the fiber surface, and the internal crystal structure of the fiber remains stable. The tensile testing machine was utilized to test the breaking strength of alumina fiber. The fiber still maintained high strength after heat treatment, and the retention rate of breaking strength was greater than 74%. ZC-90G high insulation resistance measuring instrument and WDY-Ⅱ automatic voltage tester were utilized to analyze the insulation resistivity and breakdown strength of alumina fiber before and after heat treatment. The results show that heat treatment can effectively improve the insulation performance and breakdown strength of alumina fiber.","PeriodicalId":16789,"journal":{"name":"Journal of Physics D: Applied Physics","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141783150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Two orientation effects and large anisotropy of parameters in piezo-active 2–1–2 composites based on [0 1 1]-poled crystals 基于 [0 1 1] 泊尔晶体的压电活性 2-1-2 复合材料中的两种取向效应和参数的大各向异性

IF 3.4 3区物理与天体物理

Journal of Physics D: Applied Physics Pub Date : 2024-07-24 DOI: 10.1088/1361-6463/ad5b70

Vitaly Yu Topolov

{"title":"Two orientation effects and large anisotropy of parameters in piezo-active 2–1–2 composites based on [0 1 1]-poled crystals","authors":"Vitaly Yu Topolov","doi":"10.1088/1361-6463/ad5b70","DOIUrl":"https://doi.org/10.1088/1361-6463/ad5b70","url":null,"abstract":"The results of a comparative study on piezo-active 2–1–2 composites with two ferroelectric components are discussed. The composite structure combines elements of 2–2 (laminar) and 1–3 (fibrous) connectivity patterns. The first component in each composite is domain-engineered [0 1 1]-poled single crystal with macroscopic mm2 symmetry and high piezoelectric activity. The second component is a poled ferroelectric ceramic that is represented by parallel rods in the shape of an elliptic cylinder with a large ratio of semi-axes at its base. The first orientation effect is appreciable due to rotations of the main crystallographic axes X and Y around Z || OX3 by an angle α in each crystal layer. Rotation of the ceramic rod bases by an angle γ in a polymer medium leads to the second orientation effect in the 2–1–2 composite. The two orientation effects contribute to a large anisotropy of electromechanical coupling factors , energy-harvesting figures of merit (FOM) and modified FOM for a stress-driven harvester. The large level of , , and (these parameters are of the order of 10−11–10−10 Pa−1) indicates that the studied composites are suitable for piezoelectric sensors, transducers and energy-harvesting systems. New m—α diagrams put forward in the present study show regions wherein the large anisotropy of the effective parameters ( / , )2 and , f = 1 and 2) is achieved when changing the volume fraction m of the single crystal and the rotation angle α. As a result, the leading role of the first orientation effect is emphasised.","PeriodicalId":16789,"journal":{"name":"Journal of Physics D: Applied Physics","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141783208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Magnetic relaxation between ferromagnetic and helix spin configurations in holmium films 钬薄膜中铁磁性和螺旋自旋构型之间的磁弛豫

IF 3.4 3区物理与天体物理

Journal of Physics D: Applied Physics Pub Date : 2024-07-22 DOI: 10.1088/1361-6463/ad5b02

Roman B Morgunov, Sergey N Kashin, Ekaterina I Kunitsyna, Artem D Talantsev and Aleksander I Chernov

{"title":"Magnetic relaxation between ferromagnetic and helix spin configurations in holmium films","authors":"Roman B Morgunov, Sergey N Kashin, Ekaterina I Kunitsyna, Artem D Talantsev and Aleksander I Chernov","doi":"10.1088/1361-6463/ad5b02","DOIUrl":"https://doi.org/10.1088/1361-6463/ad5b02","url":null,"abstract":"Multiple noncollinear spin structures and transitions between them initiated by field and temperature have attracted attention due to the extraordinary coexistence of complicated spin phases in Ho. We explore the magnetic relaxation dynamics within thin films undergoing transitions between ferromagnetic (FM) and helix states. When measuring susceptibility in a relatively high frequency range (∼100–1500 Hz) and magnetic viscosity at lower frequency (∼0.01 Hz), we focus on 400 nm thick Ho film. Notably, sharp variations in the real and imaginary components of magnetic susceptibility are discerned during the FM – Helix transition, occurring at temperatures between 15 and 30 K. Hysteresis effects in the magnetic susceptibility components are identified during cyclic variations in the external field, indicating a relatively rapid process with a timescale of approximately 10 ms accompanying the FM – Helix transition. The slow relaxation process is also found to exhibit sensitivity to this transition. Furthermore, the field dependence of magnetic viscosity displays a marked decline at the FM – Helix transition. The research methodologies proposed for the investigation of relaxation processes in materials with multiphase spin structures are deemed universally applicable and offer insights into transitions between spin states in materials manifesting non collinear spin structures.","PeriodicalId":16789,"journal":{"name":"Journal of Physics D: Applied Physics","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141753989","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Broadband super-resolution wavelength-controlled zoom metalens 宽带超分辨率波长控制变焦金属透镜

IF 3.4 3区物理与天体物理

Journal of Physics D: Applied Physics Pub Date : 2024-07-22 DOI: 10.1088/1361-6463/ad5f9b

Fen Zhao, Baoze Huang, Qingxiao Liu and Junbo Yang

引用次数: 0

Enhanced flexoelectricity of liquid with hydrated ions 含有水合离子的液体柔电性能增强

IF 3.4 3区物理与天体物理

Journal of Physics D: Applied Physics Pub Date : 2024-07-22 DOI: 10.1088/1361-6463/ad632f

Yifan Li, Yanyu Li, Xingjian Feng, Chongpu Zhai, Shuwen Zhang and Minglong Xu

引用次数: 0

Physical and chemical characteristics of plasma-activated water generated by hybrid dielectric barrier discharge and gliding arc discharge 混合介质阻挡放电和滑弧放电产生的等离子活化水的物理和化学特性

IF 3.4 3区物理与天体物理

Journal of Physics D: Applied Physics Pub Date : 2024-07-21 DOI: 10.1088/1361-6463/ad61f4

Nilton F Azevedo Neto, Felipe S Miranda, Pedro W P Moreira Junior, Marcelo P Gomes, Clodomiro Alves Junior, Cristiane Y Koga-Ito and Rodrigo S Pessoa

{"title":"Physical and chemical characteristics of plasma-activated water generated by hybrid dielectric barrier discharge and gliding arc discharge","authors":"Nilton F Azevedo Neto, Felipe S Miranda, Pedro W P Moreira Junior, Marcelo P Gomes, Clodomiro Alves Junior, Cristiane Y Koga-Ito and Rodrigo S Pessoa","doi":"10.1088/1361-6463/ad61f4","DOIUrl":"https://doi.org/10.1088/1361-6463/ad61f4","url":null,"abstract":"This research explores the synergistic application of Dielectric Barrier Discharge (DBD) and Gliding Arc Plasma Jet (GAPJ) in a Hybrid Plasma Discharge (HPD) setup for enhanced water activation. The HPD system demonstrated balanced and sustained generation of reactive oxygen and nitrogen species (RONS), maintaining efficiency at higher specific input energy (SIE) values. Comparative analyses with DBD and GAPJ systems highlighted the superior performance of the HPD system in generating RONS and modifying water’s molecular structure. Key observations included a decrease in water’s pH and an increase in oxidation-reduction potential, total dissolved solids, and conductivity, stabilizing beyond 5 l min−1 airflow and 10 min of treatment. UV−Vis spectroscopy identified nitrites, nitrates, hydrogen peroxide, and nitrous acid, while Raman spectroscopy captured shifts in vibrational modes, particularly in librational and O–H stretching bands. These changes correlated with alterations in reactive species concentrations and pH levels. Overall, the HPD system emerged as a versatile and efficient approach for generating plasma-activated water, suitable for applications in microbial deactivation, surface sterilization, and electrocatalytic process optimization, offering stable and continuous production of reactive species across a range of SIE values.","PeriodicalId":16789,"journal":{"name":"Journal of Physics D: Applied Physics","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141743169","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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