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Tuning the ferroelectricity of Hf0.5Zr0.5O2 with alloy electrodes

Science China(Information Sciences) 2024年第8期67卷 321-330页

作者： Keqin LIU Bingjie DANG Zhiyu YANG Teng ZHANG Zhen YANG Jinxuan BAI zelun pan Ru HUANG Yuchao YANG Beijing Advanced Innovation Center for Integrated Circuits School of Integrated Circuits Peking University School of Electronic and Computer Engineering Peking University Center for Brain Inspired Chips Institute for Artificial Intelligence Peking University Center for Brain Inspired Intelligence Chinese Institute for Brain ResearchBeijing

Tuning ferroelectricity of Hf0.5Zr0.5O2is crucial for facilitating its practical applications in various fields, including in-memory and neuromorphic computing. Previous studies have revealed that the electrodes have a significant influence on ferroelectricity, and changing electrode materials can realize different but discrete ferroelectric polarization values. Here, we introduce an alloy-electrode method, in order to achieve gradual and accurate modulation of ferroelectric polarization, especially useful for matching the polarization charges at the interface of ferroelectric insulators and ferroelectric semiconductors. Au and W electrodes are chosen as baselines for realizing weak and strong ferroelectric polarization, where the intermediate states can be achieved by adjusting the ratio of metals in the Au-W alloy. To demonstrate the generality of this approach, the Cu-W alloy electrode is also realized for tuning ferroelectric polarization. The effect of alloy electrodes on device leakage current, endurance, and retention is evaluated. In addition, the temperature stability of ferroelectric capacitors is tested, where limited changes in both remnant polarization and coercive voltages are observed, showing the great potential of the ferroelectric hafnium oxide. Such gradual modulation of ferroelectric polarization could facilitate the application of Hf0.5Zr0.5O2in in-memory and neuromorphic computing.

关键词： ferroelectric hafnium oxide alloy electrode gradual modulation temperature stability

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Tuning the ferroelectricity of HfZrOwith alloy electrodes

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Science China(Information Sciences) 2024年

Tuning ferroelectricity of Hf0.5Zr0.5O2 is crucial for facilitating its practical applications in various fields, including in-memory and neuromorphic computing. Previous studies have revealed that the electrodes have a significant influence on ferroelectricity, and changing electrode materials can realize different but discrete ferroelectric polarization values. Here, we introduce an alloy-electrode method, in order to achieve gradual and accurate modulation of ferroelectric polarization, especially useful for matching the polarization charges at the interface of ferroelectric insulators and ferroelectric semiconductors. Au and W electrodes are chosen as baselines for realizing weak and strong ferroelectric polarization, where the intermediate states can be achieved by adjusting the ratio of metals in the Au-W alloy. To demonstrate the generality of this approach, the Cu-W alloy electrode is also realized for tuning ferroelectric polarization. The effect of alloy electrodes on device leakage current, endurance, and retention is evaluated. In addition, the temperature stability of ferroelectric capacitors is tested, where limited changes in both remnant polarization and coercive voltages are observed, showing the great potential of the ferroelectric hafnium oxide. Such gradual modulation of ferroelectric polarization could facilitate the application of Hf0.5Zr0.5O2 in in-memory and neuromorphic computing.

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应用型本科院校市场营销专业实践教学体系研究

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黄山学院学报 2014年第2期16卷 109-112页

作者：赵士德潘泽沦黄山学院经济管理学院安徽黄山245041

经济的全球化、互联网的广泛使用、网络营销的推广让市场营销理论和实践快速发展,市场营销学内容更加丰富,这些变化对市场营销专业实践教学内容、实践途径、实践方法提出更高要求。结合国内外市场营销专业实践教学现状,对国内不同类型... 详细信息

经济的全球化、互联网的广泛使用、网络营销的推广让市场营销理论和实践快速发展,市场营销学内容更加丰富,这些变化对市场营销专业实践教学内容、实践途径、实践方法提出更高要求。结合国内外市场营销专业实践教学现状,对国内不同类型高校市场营销专业实践教学的特征进行对比分析,阐释应用型本科院校的市场营销专业实践教学过程中存在的不足和问题。在此基础上,从人才培养理念、人才培养模式和内外结合一体式教学等方面探索构建市场营销专业实践教学体系的途径。

关键词：市场营销专业实践教学应用型本科院校一体式实践教学体系

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