The Magnetic Field Effects on Radially Symmetric Core-Shell-Shell Structure

• 作者: Hamidreza Simchi Mahdi Smaeilzadeh Mehdi H. Saani
• 来源期刊: 光学与光子学期刊(英文)
• 学科: 数学
• 关键词: Naowire Core-Shell-Shell Structure SELF-CONSISTENT Calculation QUANTUM CAPACITANCE
• 年，卷（期）: 2011,（1）
• 页码范围: 5-10
• 页数: 6页
• 分类号: O1

摘要

In this paper, we modeled a core/shell/shell structure with cylindrical Schrodinger-Poisson coupled equation when a magnetic field is (and is not) applied along its axis. We showed the electron density is peaked near the outer surface of the channel when the magnetic field is applied. Therefore one may make a nano-device which its electrons move only on its outer surface. Also we applied a gate voltage to the device and showed a higher threshold voltage (to turn on the device) is necessary when a magnetic field is applied. This is because of the increase in the lowest energy level similar to the size quantization. i.e a device with longer channel looks like a device with shorter channel if it is placed in a magnetic field parallel to its axis.