Noise in a Two Dimensional Electron Gas

二维电子气中的噪声

• 批准号: 9110705
• 负责人: Vladimir Mitin
• 金额: $ 5.5万
• 依托单位: Wayne State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-08-15 至 1994-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9110705&HistoricalAwards=false
• 关键词: Noise; Two; Dimensional; Electron; Gas

The main goal of this project is to investigate the noise characteristics of a two-dimensional (2-D) electron gas in the presence of a strong electric field , i.e., when electrons are out of equilibrium with the lattice. This topic is important because noise defines the sensitivity and reliability of semiconductor devices. The miniaturization of these devices will lead to an emphasis on 2-D as opposed to 3-D electron gas. In the present work we will use the Boltzmann transport equation and the Monte Carlo method to simulate current fluctuation (noise) in a 2-D electron gas. By calculating the time dependence of the current- current correlation function it is possible to determine the current fluctuation and its frequency dependence. Noise is defined by scattering processes. We will study the contribution of localized and interface phonons to the noise. Special attention will be paid to scattering by the electric potential of background and remote ionized impurities. Capture by these impurity states and subsequent release will be examined; we expect that these processes will make major (and often overwhelming) contributions to noise in the high electric field region. Emphasis will be placed on the optimization of low-noise configurations for 2-D structures.

该项目的主要目标是调查 二维（2-D）噪声特性 在强电场存在下的电子气 场，即，当电子失去平衡时 与格子。 这个话题很重要，因为 噪声定义了 半导体器件. 的小型化 这些设备将导致强调二维， 与三维电子气相反。 在目前的工作中 我们将使用玻尔兹曼输运方程， 模拟电流蒙特卡罗方法 2-D电子气中的波动（噪声）。 通过 计算电流的时间依赖性， 电流相关函数， 确定电流波动及其频率 依赖 噪声由散射定义 流程. 我们将研究 局域和界面声子的噪声。 特别注意的是， 背景和远距离电离电势 杂质 被这些杂质态俘获， 将审查随后发布版本;我们预计， 这些过程将使主要的（并且通常 压倒性的）贡献的噪音在高 电场区。 重点将放在 二维低噪声结构优化 结构.