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Resistive switching Behavior in Amorphous Aluminum Oxide Film Grown by Chemical Vapor Deposition

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Chinese Physics Letters 2014年第7期31卷 197-200页

作者：全晓彤朱慧超蔡海涛张家琦王晓娇 School of Electronic Science and Technology Dalian University of Technology Dalian 116024

The repeatable bipolar resistive switching phenomenon is observed in amorphous Al2O3 prepared by metalorganic chemical vapor deposition on ITO glass, with ITO as the bottom electrode and Ag as the top electrode. The crystal structure, morphology, composition and optical properties of Al2O3 thin films are investigated by x-ray diffraction, x-ray photoelectron spectroscopy, atomic force microscopy and ultraviolet-visible-infrared spectroscopy, respectively. The electronic character of Ag/Al2O3/ITO structure is tested by an Agilent B1500A. The device shows a typical bipolar resistive switching behavior under the dc voltage sweep mode at room temperature. The variation ratio between HRS and LRS is larger than nearly three orders of magnitude, which indicates the good potential of this structure in future resistive random access memory （ReRAM） applications. Based on the conductive filament model, the high electric field is considered the main reason for the resistive switching according to our measurements.

关键词： ALUMINUM oxide films METAL organic chemical vapor deposition switching circuits CRYSTAL structure ELECTRONIC structure

Ultralow-Voltage Electric-Double-Layer Oxide-Based Thin-Film Transistors with Faster switching Response on Flexible Substrates

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Chinese Physics Letters 2014年第7期31卷 218-221页

作者：张进吴国栋 Wuhan National Laboratory for Optoelectronics School of Optoelectronic Science and Engineering Huazhong University of Science and Technology Wuhan 430074 School of Electronic Science and Engineering Nanjing University Nanjing 210093 Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201

Phosphosilicate glass （PSG） electrolyte films are deposited by improving the content of phosphorus doping during plasma-enhanced chemical vapor deposition, and a fast electric-double-layer （EDL） polarization response of 100 kHz is measured. The mechanism of the fast polarization response and EDL formation are investigated in detail. By using PSG electrolyte films as gate dielectrics, indium-zinc-oxide （1Z0） thin-film transistors （TFTs） are fabricated on flexible plastic substrates. Due to the huge EDL gate capacitance, such TFTs show only 0.8 V operation and excellent electrical performances with a large current on/off ratio of 10^7, low subthreshold swing of 72 m V/decade and high Eeld-effect mobility of 16.76 cm^2 /V·s. More importantly, the devices exhibit a fast switching response above 100Hz. Our results demonstrate that such PSG gated TFTs take a great step for low-power flexible oxide electronics application.

关键词： THIN film transistors ELECTRIC double layer switching circuits PHOSPHOSILICATE glass POLARIZATION (Electricity)

Current Induced Non-Volatile Resistive switching Effect in Silicon Devices with Large Magnetoresistance

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Chinese Physics Letters 2014年第7期31卷 156-159页

作者：王集敏章晓中朴红光罗昭初熊成悦 Key Laboratory of Advanced Materials (MOE) School of Materials Science and Engineering Tsinghua University Beijing 100084 National Center for Electron Microscopy (Beijing) Tsinghua University Beijing 100084

We develop a non-volatile resistive switching device in a Si-SiO2-Mg structure with an on/off ratio of about 4.5 at a certain transition voltage after being stimulated by a large current. It is observed that the resistance transition voltage Vt shifts reproducibly under a reversed large current. By applying a reading voltage in the range of Vt, non-volatile resistive switching phenomena with an endurance of more than 80 cycles are observed. Moreover, it is also found that the magnetic field could shift Vt to higher values, yielding a voltage dependent room-temperature magnetoresistance in the range of 10^3 % at 1 T. The multifunctional properties of the silicon device suggested by this work may be beneficial to the silicon based industry.

关键词： MAGNETORESISTANCE SILICON switching circuits ELECTRIC currents ELECTRIC potential TEMPERATURE effect

switching Behavior Induced by Electric and Magnetic Fields in （La0.73Bi0.27）0.67Ca0.33MnO3

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Chinese Physics Letters 2014年第4期31卷 159-162页

作者： WANG Ye-Shuai XIA Nian-Ming ZUO Hua-Kun SHEN Yi-Ning XIA Zheng-Cai Wuhan National High Magnetic Field Center Huazhong University of Science and Technology Wuhan 430074

Both electric and magnetic field-induced switching behaviors between a high resistive state and a low resistive one are observed in （La0.73Bi0.27）0.67Ca0.33MnO3. The effects of magnetoresistance *** electric-resistance suggest that the applied electric field and magnetic field greatly tune the percolative paths in the phase-separated system. According to the experimental results, the switching behaviors may come from the coexistence of the charge ordering state, and localized and freedom ferromagnetic states, in which the external field destroys partially the localized ferromagnetic states and charge ordering leads to the ferromagnetic state growth, which causes a switch between a high resistive state and low resistive one. This makes the doped manganite a good system for both electric and magnetic field sensor materials.

关键词： switching circuits MAGNETIC fields ELECTRIC resistance FERROMAGNETISM MAGNETORESISTANCE

Analysis of IPACT network performance considering channel switch latency for WDM-EPON

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Chinese Optics Letters 2011年第6期9卷 24-27页

作者：周钊肖石林朱敏毕美华 State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiaotong University

In wavelength-division multiplexing （WDM） ethernet passive optical networks （EPONs）, to realize the statistical multiplexing of upstream wavelength resources, some optical tunable components are introduced in the optical network units. However, the switch latency （SL） of these tunable components constrains the performance of WDM-EPON. In this letter, we extend the mathematical model of the WDM interleaved polling with adaptive cycle time （IPACT） scheme by additionally considering the SL conditions. We also investigate the effect of channel SL on network performance. The simulation results show that the performance of WDM-IPACT-SL deteriorates as the SL increases.

关键词： Ethernet Ethers Fiber optic networks Mathematical models Multiplexing Multiplexing equipment Network performance switching circuits

A 5.9-mJ 500-Hz Electro-Optic Q-Switched 1053 nm Nd：LiLuF4 Laser

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Chinese Physics Letters 2014年第2期31卷 59-61页

作者：杨琦朱小磊陆婷婷马剑杭寅陈卫标 Shanghai Key Laboratory of All Solid-State Laser and Applied Techniques Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences Shanghai 201800 University of Chinese Academy of Sciences Beijing 100049 Key Laboratory of Materials for High Power Laser -Shanghal Institute of Optics and Fine Mechanics Chinese Academy of Sciences Shanghai 201800

An efficient and high power 1053 nm electro-optic Q-switched Nd：LiLuF4 laser, end-pumped by two fiber coupled laser diodes at wavelength 806 nm, is reported for the first time. With an incident pump power of 24.4 W, the maximum laser output power of 7.3 W is achieved in free-running mode, and the optical conversion efficiency is 29.8%. For the Q-switched operation, the shortest pulse width of 17ns is obtained at the pulse repetition rate of 500 Hz, corresponding to the pulse energy of 5.9mJ with the peak power of 0.35 MW.

关键词： NEODYMIUM lasers ELECTROOPTICS switching circuits WAVELENGTHS ENERGY conversion

Modeling and Stability Analysis of DC-DC Buck Converter via Takagi-Sugeno Fuzzy Approach

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Modeling and Stability Analysis of DC-DC Buck Converter via ...

Theory of Current Transmission Switches and Its Application to Design of a Novel Current-Mode CMOS Ternary Schmitt Trigger

2008 3rd International Conference on Intelligent System and Knowledge Engineering(ISKE 2008)

作者： Kamyar Mehran Damian Giaouris Bashar Zahawi School of Electrical Electronic and Computer Engineering Newcastle University Newcastle upon Tyne UK Member IEEE

The DC-DC voltage-mode controlled buck converter is a nonlinear, nonsmooth system that presents different circuit topologies within one switching cycle. This paper develops a Takagi-Sugeno fuzzy approach for modeling this circuit to cap- ture all the essential nonlinearities that occur in fast time scale. Based on the resulting model, we propose tractable mathematical stability analysis for identifying fast-scale instabilities of the converter, more specifically the edge of bifurcation phenomena, employing nonsmooth Lyapunov functions. The search for the Lyapunov functions are formulated as Linear Matrix Inequalities （LMI） feasibility problem which easily can be solved using up- to-date interior point methods.

关键词： Stability analysis Buck converters Takagi-Sugeno model Lyapunov method Nonlinear control systems Voltage control Control systems Circuit topology switching circuits Mathematical model

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Theory of Current Transmission Switches and Its Application ...

A novel DC-AC Single Phase Resonant Inverter using soft switching boost converter

2005 6th International Conference on ASIC

作者： Guoqiang Hang Department of Information and Electronic Engineering Zhejiang University

＜正＞Guided by the switch-signal theory,this paper introduces design theory suitable for current-mode CMOS circuits at switch *** this basis,the operations of current transmission switch used to describe the action of threshold-controllable switch in Schmitt trigger are established,and a novel current-mode CMOS ternary Schmitt trigger with ternary output current or/and voltage signal is *** two hysteresis current values of ternary Schmitt trigger are controlled by only sizing the transistor aspect *** main properties of the circuit are its simple structure,fully adjustable hysteresis and suitable for low-voltage applications.A design example and the HSPICE simulation results with a power supply of 1.5V are given.

关键词： Switches Trigger circuits switching circuits Hysteresis MOSFETs Power supplies Optical noise Optical control Design engineering Threshold voltage

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A novel DC-AC Single Phase Resonant Inverter using soft swit...