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For Selected: Download Citations EndNote Ris BibTeX Toggle Thumbnails Select Effect of Se and Te Substitution Doping on Electronic Transport Properties of WS2-MoS2 Nanodevices LIN Li'e, LIAO Wenhu Journal of Jishou University(Natural Sciences Edition)    2023, 44 (1): 14-23.   DOI: 10.13438/j.cnki.jdzk.2023.01.003 Abstract （243）      PDF（pc） （7067KB）（112）       Knowledge map    Save Based on the first-principles calculation method of combining the density functional theory and the Non-equilibrium Green's function,the effect of Se and Te atom substitution doping on the electronic transport properties of WS2-MoS2 nanodevice is studied.The results show that the WS2-MoS2 nanodevice has interesting negative differential resistance effect in the bias range of [+0.7 V,+1.0 V] and [-1 V,-0.9 V],with the current gradually decreasing with the increase of bias voltage,and the electronic transport properties of the device show indirect gap semiconductor characteristics.The device can be converted into p-type semiconductor when replaing the S-atoms in WS2-MoS2 composite nanodevice with Se-atoms.When the S-atoms in WS2-MoS2 composite nanodevice is partially doped with substitutional Te-atoms,the device is converted into p-type semiconductor or even metal,and its conductivity is greatly improved.The partial substitution doping of WS2-MoS2 nanodevice with Se and Te atoms exhibits a negative differential resistance effect,and the passing of currents across the devices is significantly improved. Reference | Related Articles | Metrics | Comments（0） Select Thermal Lens Effect with Low-Power Laser LIN Yiping, CHEN Kexiong, LI Lingyan, LIU Jingfeng Journal of Jishou University(Natural Sciences Edition)    2022, 43 (4): 34-41.   DOI: 10.13438/j.cnki.jdzk.2022.04.007 Abstract （516）      PDF（pc） （4462KB）（220）       Knowledge map    Save COMSOL Multiphysics 5.5 software was used to build a model to study the relationship between the change of lens focal length and the change of laser power.The experimental scheme was designed through theoretical analysis and the formula for calculating the focal length of the thermal lens was determined.Experiments were conducted to explore the thermal lens effect with low power laser,and the visualization of the thermal lens effect with low-power laser was realized.The soy sauce lens was measured as thermal concave lens.Using knife edge method and software fitting measurement of laser radius,combined with other data to calculate the focal length of the thermal concave lens,the measured relative error was 3.6%.Finally,taking the focal length as the intensity reference of the thermal lens effect,the measured intensity of the thermal lens effect was positively correlated with the optical power. Reference | Related Articles | Metrics | Comments（0） Select Doping Regulation of Rectification Characteristics of GeSe Nanoelectronic Devices CHENG Yangming, LIAO Wenhu Journal of Jishou University(Natural Sciences Edition)    2022, 43 (4): 42-46.   DOI: 10.13438/j.cnki.jdzk.2022.04.008 Abstract （327）      PDF（pc） （1714KB）（131）       Knowledge map    Save The rectification characteristics of  GeSe nanoelectronic devices with different channel length of the central semiconductor doped with group V atomic substitution is investigated by using a combination of density general function theory and nonequilibrium Green's function.Results that:under positive bias,the current of armchair germanium selenide nanoribbons with 5.1 nm central semiconductor channel lengths increases with increasing voltage;while under negative bias,the current does not vary with voltage as the central semiconductor channel length increases from 1.7 nm to 3.4 nm;the magnitude is close to zero when the channel length of the central semiconductor continues to increase,and the devices exhibit significant rectification characteristics. Reference | Related Articles | Metrics | Comments（0） Select Topological States of Two-Dimensional Honeycomb Elastic Materials LI Yinming, KONG Peng, BI Rengui, HE Zhaojian, DENG Ke Journal of Jishou University(Natural Sciences Edition)    2022, 43 (4): 47-50.   DOI: 10.13438/j.cnki.jdzk.2022.04.009 Abstract （456）      PDF（pc） （1996KB）（166）       Knowledge map    Save We introduce the concept of valley states to elastic materials and design a two-dimensional honeycomb elastic phonon crystal.When the system is protected by inverse symmetry,three pairs of Dirac points appear at the K and K′ point,distributed in different frequency bands.The spatial symmetry of the system is broken by adjusting its geometrical structure parameters so that the Dirac points open and form valley at the K and K′ point.In this multi-band valley exists edge states connecting the upper and lower body bands,which is used in elastic materials can be used to achieve edge transport and design acoustic devices with good performance. Reference | Related Articles | Metrics | Comments（0） Select Study on Sound Insulation of Second Order Helmholtz Resonator ZHAO Zhun, KONG Peng, DENG Ke Journal of Jishou University(Natural Sciences Edition)    2021, 42 (4): 27-30.   DOI: 10.13438/j.cnki.jdzk.2021.04.006 Abstract （704）      PDF（pc） （1378KB）（453）       Knowledge map    Save Based on the sound insulation characteristics of the traditional Helmholtz resonator, the equivalent impedance of the Helmholtz resonator based on second-order resonance is derived by using the transfer matrix method layering, and the sound insulation characteristics of the second-order Helmholtz resonator are studied in combination with finite element simulation. It is verified that there are two sound insulation bands in the second-order resonator, and excellent sound insulation effect can be obtained by adjusting the geometric parameters. It has some research significance in acoustic application of sound noise reduction. Reference | Related Articles | Metrics | Comments（0） Select Doping Manipulationon the Electron Transport Properties of the Phosphorene-Boron Carbon Diphosphorus Heterojunction WU Dan, LIAO Wenhu, LIN Lie, LUO Shuzhen, CHENG Xiaoli Journal of Jishou University(Natural Sciences Edition)    2021, 42 (4): 31-37.   DOI: 10.13438/j.cnki.jdzk.2021.04.007 Abstract （474）      PDF（pc） （2058KB）（277）       Knowledge map    Save Using the first-principles calculation method combining density functional theory and non-equilibrium Green's function, the electron transport properties of the armchair edge and the zigzag P-BC2P van der Waals heterojunction under finite bias are studied, and the influence of N-type electrons and P-type holes doping on the electron transport properties of the two edge types of heterojunctions. The research results show that: (1) Under the finite bias voltage, the two edge types P-BC2P van der Waals heterojunctions both exhibit nonlinear changes and negative differential resistance effects. The current growth of the P-BC2P heterojunction at the edge of the armchair is faster than that of the phosphorene nanoribbons, but the current growth of the P-BC2P heterojunction at the zigzag edge is slower than that of the phosphorene nanoribbons. (2) In the doping concentration range of 0.001~0.01 e/atom, N-type electrons/P-type holes doping can effectively control the conductance of P-BC2P heterojunction. Compared with the undoped, the conductance of the P-BC2P heterojunction at the edge of the armchair increases and decreases by up to 20% when doped with P-type holes, and decreases by up to 46.7% when doped with N-type electrons. The conductance of the zigzag edge P-BC2P heterojunction increases up to 196% when doped with P-type holes, and increases up to 164% when doped with N-type electrons. Reference | Related Articles | Metrics | Comments（0） Select An Attack Strategy for the Perfect Quantum Seal HUANG Jiang,ZHAN Qiang,LIN Meiping,WANG Shihong,HUANG Rong,WU Huixian Journal of Jishou University（Natural Sciences Edition)    DOI: 10.13438/j.cnki.jdzk.2019.01.010 Select Acoustic Capture of Spherical Particles Based on the Periodic Grid Structure OUYANG Wenle,ZOU Feng,HE Hailong,HE Zhaojian,DENG Ke,ZHAO Heping Journal of Jishou University（Natural Sciences Edition)    DOI: 10.13438/j.cnki.jdzk.2019.01.011 Select Three Flavors of Chiral Phases with Vacuum Contribution in the Quark-Meson Model Including the Vacuum Fluctuation LU Haipeng,LIU Min Journal of Jishou University（Natural Sciences Edition)    DOI: 10.13438/j.cnki.jdzk.2018.05.010 Select Band Structure Calculation of Piezoelectric Phononic Crystal by Finite Element Method WU Jien,HU Ruixia,DENG Ke Journal of Jishou University（Natural Sciences Edition)    DOI: 10.3969/j.cnki.jdxb.2018.03.007 Select Manipulation of the Electronic Band Structure of Monolayer MoS2 in Presence of Exchange Field and Off-Resonant Light ZHANG Xincheng,LIAO Wenhu Journal of Jishou University（Natural Sciences Edition)    DOI: 10.3969/j.cnki.jdxb.2018.03.008 Select Physical Characteristics of One Carbon Phenolic Material Under High-Speed Symmetric Loading ZHU Zhigang,ZENG Yuefei,GAO Ge,LI Yongchi Journal of Jishou University（Natural Sciences Edition)    DOI: 10.3969/j.cnki.jdxb.2018.03.009 Select Effects of Microgrooves Structure on Bubble Period on Surfaces with Micro-Nano Composite Structure DAI Xinlong，YE Fuqiu，HU Xuegong，ZHOU Wenbin，LUAN Yijun，YU Yingying，TANG Jinchen Journal of Jishou University（Natural Sciences Edition)    DOI: 10.3969/j.cnki.jdxb.2017.04.004 Select Dynamic Characteristics of Quantum Fisher Information ofAtomic System in Amplitude Damping Channel GUO Xiuli，ZHANG Yanliang，ZHOU Qingping Journal of Jishou University（Natural Sciences Edition)    DOI: 10.3969/j.cnki.jdxb.2017.04.005 Select Size-Controlled Synthesis and Magnetite Recovery of Superparamagnetic Fe3O4 Microparticles CHEN Feitai，YAN Qiuhui，LI Qing，WU Yebo，ZHOU Yancheng Journal of Jishou University（Natural Sciences Edition)    DOI: 10.3969/j.cnki.jdxb.2016.05.005 Select Traffic Monitoring and User Monitoring Scheme Based on Quantum Teleportation HU Xiaohuan，ZHOU Xiaoqing,LI Zhiwei,ZHU Yuwei Journal of Jishou University（Natural Sciences Edition)    DOI: 10.3969/j.cnki.jdxb.2016.05.006 Select Chaotic Transport for Single Particle in Tilted Optical Lattice with Periodical Modulation ZHU Bo, LIN Juan-Ping, ZHONG Hong-Hua journal6    2015, 36 (6): 35-39.   DOI: 10.3969/j.cnki.jdxb.2015.06.009 Abstract （1628）      PDF（pc） （3451KB）（1293）       Knowledge map    Save The chaotic dynamic behavior of single particle in the tilted optical lattice with periodical modulation is explored,and the effect of chaos on quantum transport is studied under the strong modulating case.The chaos is found to assist quantum tunneling only when the modulation frequency matches with the gradient of lattice;otherwise,the chaos promotes localization.Therefore,the quantum transport of the particle can be manipulated via adjusting periodical modulation. Reference | Related Articles | Metrics | Comments（0） Select Analytical Solution of Rectangular Plate Deflection with  Surface Effects at Nanoscale JIANG Li-Xin, CAO Gao-Feng, LIN Hao journal6    2015, 36 (6): 40-43.   DOI: 10.3969/j.cnki.jdxb.2015.06.010 Abstract （1841）      PDF（pc） （361KB）（1380）       Knowledge map    Save Gurtin’s theory on surface elasticity was introduced into the deformation analysis of a thin plate at nanoscale under external loads.With small deformation theory，the differential equation of the nanometer-sized thin plate with surface effects was established.Analytical solutions of the deflection of a plate were obtained through series expansions，including the quadrilateral simply supported plate under uniformly distributed load，the quadrilateral simply supported plate with symmetrically distributed bending moment on the two opposite sides,and the quadrilateral simply supported plate with dissymmetrically distributed bending moment on the two opposite sides. The influence of the surface effects on the deformation of the plate was demonstrated. Reference | Related Articles | Metrics | Comments（0）