Resonance Transmission in Graphene-Nanoribbon-Based Quantum Dot and Superlattice

• 作者: 丁建文 孙厚谦 徐宁 王保林
• 来源期刊: 中国物理快报(英文版)
• 学科: 物理学
• 关键词: 量子点超晶格 透射谱 基础 纳米带 石墨 共振 电子传输 能量变化
• 年，卷（期）: 2010,（10）
• 页码范围: 190-193
• 页数: 4页
• 分类号: O437.3 O734
• 语种: 英文

摘要

By using a decomposition elimination method for Green's function, the transport properties of Graphenenanoribbon-based quantum dot (QD) and/or QD superlattice are studied. It is shown that relatively small changes of both QD size and magnetic field intensity can induce strong variations in the electron transmission across the structure. For a QD device, electrons can be either totally reflected or totally transmitted through the QD region at some energies, and the quasibound peaks have been observed to have a small shift due to quasibound state energy varying. In the case of QD superlattice, the electrons within the miniband energy region can transmit through a device, similar to a QD device. Therefore, the transmission spectrum can be tailored to match with requirement by modulating the size of quantum dot and the number P of superlattice.