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Journal of Rare Earths 2024年第8期42卷 1604-1609,I0007页

作者： Daiming Liu Fei Wang Yongtao Zhang Ya'nan Ding Shandong engineering laboratory for Preparation and Application of High-performance Carbon-Materials College of Electromechanical EngineeringQingdao University of Science&TechnologyQingdao266061China college of Electronic and information engineering Shandong University of Science and TechnologyQingdao266590China

The use of high-permittivity(high-k) thin films as gate dielectrics is essential in the development of lowpower electronics,In this work,rare-earth thulium oxide(Tm_(2)O_(3)) thin films were prepared by a facile solution process and annealed at various temperatures from 400 to 700℃.The evolution of the physical and dielectric properties of Tm_(2)O_(3) thin film with annealing temperature was *** is demonstrated that the Tm_(2)O_(3) thin film annealed at 600℃ exhibits the optimal performance,including a low leakage current of 3×10^(-10) A/cm^(2),a large areal capacitance of 250 nF/cm^(2) at 100 Hz,and a high permittivity value of *** Tm_(2)O_(3) thin film as a gate insulator was integrated into the thin film transistor(TFT) employing In_(2)O_(3)-based semiconducting *** In_(2)O_(3) TFT with 600℃-annealed Tm_(2)O_(3) dielectric exhibits the superior perfo rmance,with a high I_(on)/I_(off) of 1.65×10^(7),a small subthre shold swing(SS) value of 0.2 V/dec,a V_(TH) of+1.8 V,and a mobility of 1.68 cm^(2)/(V·s).Furthermore,an inverter constructed by connecting the TFT with a resistor exhibits full-swing *** work provides a facile and appealing method for preparing the high-k Tm_(2)O_(3) thin films as alternative gate dielectrics with the potential for use in low-power electronics and logic circuit applications.

关键词： Rare earths Tm_(2)O_(3) Dielectric Transistor Inverter

Effects of power on ion behaviors in radio-frequency magnetron sputtering of indium tin oxide(ITO)

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Plasma science and Technology 2024年第7期26卷 116-122页

作者：李茂洋莫超超陈佳丽季佩宇谭海云张潇漫崔美丽诸葛兰剑吴雪梅黄天源 School of physical science and Technology Soochow UniversitySuzhou 215000People’s Republic of China Key Lab of thin Film Materials of Jiangsu Province Suzhou 215000People’s Republic of China Suzhou Maxwell Technologies Co.Ltd. Suzhou 215000People’s Republic of China School of Optical and Electronic information Suzhou City University&Suzhou Key Laboratory of BiophotonicsSuzhou 215104People’s Republic of China School of Optoelectronic science and engineering Soochow UniversitySuzhou 215000People’s Republic of China Analysis and Testing Center Soochow UniversitySuzhou 215000People’s Republic of China School of Aviation and Transportation Jiangsu College of Engineering and TechnologyNantong 226006People’s Republic of China

This study delves into ion behavior at the substrate position within RF magnetron discharges utilizing an indium tin oxide(ITO)*** positive ion energies exhibit an upward trajectory with increasing RF power,attributed to heightened plasma potential and initial emergent ***,the positive ion flux escalates owing to amplified sputtering rates and electron ***,negative ions exhibit broad ion energy distribution functions(IEDFs)characterized by multiple *** patterns are clarified by a combination of radiofrequency oscillation of cathode voltage and plasma potential,alongside ion transport *** elucidation finds validation in a one-dimensional model encompassing the initial ion *** higher RF power,negative ions surpassing 100 e V escalate in both flux and energy,posing a potential risk of sputtering damages to ITO layers.

关键词： RF magnetron sputtering ITO film ion energy distribution functions plasma diagnosis

The influence of the Dresselhaus spin-orbit coupling on the tunnelling magnetoresistance in ferromagnet/ insulator /semiconductor/ insulator /ferromagnet tunnel junctions

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Chinese Physics B 2009年第2期18卷 749-756页

作者：王晓华安兴涛刘建军 college of physical science and information engineering Hebei Normal University hebei advanced thin films laboratory

This paper investigates the effect of Dresselhaus spin orbit coupling on the spin-transport properties of ferromagnet/insulator/semiconductor/insulator/ferromagnet double-barrier structures. The influence of the thickness of the insulator between the ferromagnet and the semiconductor on the polarization is also considered. The obtained results indicate that （i） the polarization can be enhanced by reducing the insulator layers at zero temperature, and （ii） the tunnelling magnetoresistance inversion can be illustrated by the influence of the Dresselhaus spin-orbit coupling effect in the double-barrier structure. Due to the Dresselhaus spin-orbit coupling effect, the tunnelling magnetoresistance inversion occurs when the energy of a localized state in the barrier matches the Fermi energy EF of the ferromagnetic electrodes.

关键词： Dresselhaus spin-orbit coupling ferromagnet/insulator/semiconductor/insulator/ferromagnet double-barrier structures transfer-matrix method

Entanglement evolution of three-qubit mixed states in multipartite cavity-reservoir systems

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Chinese Physics B 2012年第8期21卷 44-50页

作者：许景周郭金宝文伟白彦魁闫凤利 college of physical science and information engineering and hebei advance thin films laboratory Hebei Normal University State Key laboratory of Superlattices and Microstructures Institute of SemiconductorsChinese Academy of Sciences

We analyze the multipartite entanglement evolution of three-qubit mixed states composed of a GHZ state and a W state. For a composite system consisting of three cavities interacting with independent reservoirs, it is shown that the entanglement evolution is restricted by a set of monogamy relations. Furthermore, as quantified by the negativity, the entanglement dynamical property of the mixed entangled state of cavity photons is investigated. It is found that the three cavity photons can exhibit the phenomenon of entanglement sudden death （ESD）. However, compared with the evolution of a generalized three-qubit GHZ state which has the equal initial entanglement, the ESD time of mixed states is later than that of the pure state. Finally, we discuss the entanglement distribution in the multipartite system, and point out the intrinsic relation between the ESD of cavity photons and the entanglement sudden birth of reservoirs.

关键词： entanglement evolution three-qubit mixed states cavity-reservoir systems

Frequency-Self-Adaptive Radio Frequency Power Harvester Enabled by Shape-Reconfigurable Liquid Metal

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Electromagnetic science 2024年第2期2卷 91-103页

作者： Cheng Zhang Yuchao Wang Zebin Zhu Hai Lin Kun Wang Xintong Shi Yi Du Chaoyun Song Long Ren Qiang Cheng Key laboratory of Materials for High-Power Laser Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China Hangzhou Institute for advanced Study University of Chinese Academy of SciencesHangzhou 310024China college of physical science and Technology Central China Normal UniversityWuhan 430000China Center of Quantum and Matter science and School of Physics Beihang UniversityBeijing 100191China Department of engineering King’s College LondonLondon WC2R 2LSUK State Key laboratory of Radio Frequency Heterogeneous Integration College of Electronics and Information EngineeringShenzhen UniversityShenzhen 518000China State Key laboratory of advanced Technology for Materials Synthesis and Processing International School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430000China State Key laboratory of Millimeter Waves Southeast UniversityNanjing 210096China

Radio frequency(RF)energy harvester as an efficient tool for capturing and converting the flourishing ambient RF energy provides a promising solution for long-term powering the wireless sensor networks and the Internet of things(IoTs).However,the actual distribution of the environmental RF signals is dynamically frequency-dependent due to the diverse wireless terminals only interacting with specified *** take full advantage of the RF energy carrying this characteristic,an intelligent RF energy harvester is in demand to automatically sense the frequency information of an incident signal and conduct the corresponding RF-to-direct current transformation ***,to the best of my knowledge,a frequency-self-adaptive RF harvester is first presented with the help of the shape-reconfigurable liquid metal,which can precisely identify and efficiently convert an arbitrary signal from the frequency span of 1.8 to 2.6 *** with a microcontroller unit and a tensile system,the dynamic functionality of the entire system is comprehensively demonstrated,showing promising potential to significantly advance various fields,including sustainable IoT applications,green wearable technologies,and self-powered devices.

关键词： Liquid metal Radio frequency power harvesting Frequency-self-adaptive Broadband rectification

Measurement-induced nonlocality in the W and Greenberger–Horne–Zeilinger superposition states

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Chinese Physics B 2015年第3期24卷 61-65页

作者：林秦白彦魁叶明勇林秀敏 Fujian Provincial Key laboratory of Quantum Manipulation and New Energy Materials College of Physics and EnergyFujian Normal University college of physical science and information engineering and hebei advance thin films laboratory Hebei Normal University

Measurement-induced nonlocality（MIN） is a newly defined quantity to measure correlations in bipartite quantum states [Luo S and Fu S 2011 Phys. Rev. Lett. 106 120401]. MIN in the n-qubit W and Greenberger–Horne–Zeilinger（GHZ） superposition states is considered. It is revealed that n = 3 and n ≥ 4 states have very different characteristics,especially the monogamy relation about MIN, and the monogamy equality of MIN is held in all n-qubit W states（n ≥ 3）.

关键词： measurement-induced nonlocality monogamy W state

Conductance in an Aharonov-Bohm Interferometer with Parallel-Coupled Double Dots

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Chinese Physics Letters 2009年第9期26卷 223-226页

作者：安兴涛赵金荣刘建军 college of physical science and information engineering Hebei Normal University Shijiazhuang Hebei 050016 hebei advanced thin films laboratory Shijiazhuang Hebei 050016 First Middle School of Zhangjiakou Zhangjiakou Hebei 075000

We present a theoretical study of the conductance in an Aharonov-Bohm interferometer containing two coupled quantum dots. The interdot tunneling divides the interferometer into two coupled subrings, where opposite magnetic fluxes are threaded separately while the net flux is kept zero. Using the Green function technique we derive the expression of the linear conductance. It is found that the Aharonov-Bohm effect still exists, and when the level of each dot is aligned, the exchange of the Fano and Breit-Wigner resonances in the conductance can be achieved by tuning the magnetic flux. When the two levels are mismatched the exchange may not happen. Further, for some specific asymmetric systems where the coupling strengths between the two dots and the leads are not equal, the flux can change the Fano resonance into an antiresonance, which is absent in symmetric systems.

关键词： No English Keyword

Oxygen-deficient TiO_(2) Yolk-shell Spheres for Enhanced Lithium Storage Properties

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Energy & Environmental Materials 2022年第1期5卷 238-244页

作者： Zhaoqian Li Yuqi Peng Chaofeng Liu Xianxi Zhang Xiuling Li Yang Huang Yingke Ren Denghui Ji Guozhong Cao Key laboratory of Photovoltaic and Energy Conservation Materials CASInstitute of Solid State PhysicsHefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031China college of science Hebei University of Science and TechnologyShijiazhuang 050018China Shandong Provincial Key laboratory/Collaborative Innovation Center of Chemical Energy Storage&Novel Cell Technology School of Chemistry and Chemical EngineeringLiaocheng UniversityLiaocheng 252000China Department of Materials science and engineering University of WashingtonSeattle WA 98195USA college of Physics Mechanical and Electronical CollegeShijiazhuang UniversityShijiazhuang City 050035P.R.China college of Physics and information engineering Hebei Advanced Thin Films LaboratoryHebei Normal UniversityShijiazhuang City 050024P.R.China

Anatase TiO_(2) is a promising anode material for lithium-ion batteries(LIBs)owing to its low cost and ***,the intrinsically kinetic limits seriously hindered its lithium-ion storage *** we present that anatase TiO_(2) with rich oxygen vacancies can enhance its lithium-ion storage *** synthesize anatase TiO_(2) with well-retained hierarchical structure by annealing the H_(2)Ti_(5)O_(11)·3H_(2)O yolk-shell spheres precursor in nitrogen *** and XPS data evidence that the oxygen-deficient environment could generate abundant oxygen vacancies in the as-derived anatase TiO_(2),which leads to improved electron conductivity and reduced charge-transfer *** rich oxygen vacancies and high structural integrity of the hierarchical yolk-shell spheres enable the as-derived anatase TiO_(2) yolk-shell spheres with a high specific capacity of 280 mAh g^(-1) at 100 mA g^(-1) and 71%of capacity retention after 5000 cycles at 2 A g^(-1).

关键词： anatase TiO_(2) lithium-ion batteries oxygen vacancies yolk-shell spheres

Electronic States of Elliptical Quantum Rings Subjected to a Magnetic Field

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Chinese Physics Letters 2008年第11期25卷 4101-4104页

作者：李海涛刘力哲刘建军 college of physical science and information engineering Hebei Normal University Shijiazhang 050016 hebei advanced thin films laboratory Shijiazhuang 050016 Department of Physics Chengde Teacher's College Chengde 067000

We calculate the energy states and Aharonov Bohm oscillations of an electron in elliptical quantum rings in the presence of a uniform magnetic field by using an exact numerical diagonalization. The calculated results show that the elliptical quantum rings are flatter, larger amplitudes and periods of the Aharonov-Bohm oscillations are observed. In addition, in the limits of a circular quantum ring, the results of our approach are in good agreement with those of earlier theories.

关键词： the power-law exponents precipitation durative abrupt precipitation change

Recent progress and perspectives on Sb_(2)Se_(3)-based photocathodes for solar hydrogen production via photoelectrochemical water splitting

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Journal of Energy Chemistry 2022年第4期31卷 508-523页

作者： Shuo Chen Tianxiang Liu Zhuanghao Zheng Muhammad Ishaq Guangxing Liang Ping Fan Tao Chen Jiang Tang Shenzhen Key laboratory of advanced thin films and Applications Key Laboratory of Optoelectronic Devices and SystemsCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060GuangdongChina Hefei National laboratory for physical sciences at Microscale CAS Key Laboratory of Materials for Energy ConversionDepartment of Materials Science and EngineeringSchool of Chemistry and Materials ScienceUniversity of Science and Technology of ChinaHefei 230026AnhuiChina Wuhan National laboratory for Optoelectronics(WNLO) School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan 430074HubeiChina

Photoelectrochemical(PEC) cells involved with semiconductor electrodes can simultaneously absorb solar energy and perform chemical reactions, which are considered as an attractive strategy to produce renewable and clean hydrogen energy. Sb_(2)Se_(3) has been widely investigated in constructing PEC photocathodes benefitting of its low toxicity, suitable band gap, superior optoelectronic properties, and outstanding photocorrosion stability. We first present a brief overview of basic concepts and principles of PEC water splitting as well as a comparison between Sb_(2)Se_(3) and other numerous candidates. Then the material characteristics and preparation methods of Sb_(2)Se_(3) are introduced. The development of Sb_(2)Se_(3)-based photocathodes in PEC water splitting with various architectures and engineering efforts(i.e., absorber engineering, interfaces engineering, co-catalyst engineering and tandem engineering) to improve solar-to-hydrogen(STH) efficiency are highlighted. Finally, we debate the possible future directions to further explore the researching fields of Sb_(2)Se_(3)-based photocathodes with a strongly positive outlook in PEC processed solar hydrogen production.

关键词： Sb_(2)Se_(3) Photocathodes Photoelectrochemical Water splitting Solar-to-hydrogen