ELECTRONIC PROPERTIES OF A TWO-DIMENSIONAL RING-SHAPED KRONIG-PENNEY LATTICE WITH A POSITIONAL DISORDER

摘要：

We study the effects of a positional disorder in a circular quantum dot array.The potential is modeled by a two-dimensional ring-like Kronig-Penney lattice with a hard-wall radial confinement potential.It is found that even for a small deviation of a barrier from its position in a perfect periodic array, the all energy states in energy spectrum move away from each other by opening energy gaps.This causes to the quenching of Aharonov-Bohm oscillations and results in an enormous reduction in the persistent tunneling current.

关键词： Semiconductor nanostructures quantum confinement quantum dot array Kronig-Penney model

作者: HOJJATOLLAH K.SALEHANI MAHDI ESMAEILZADEH KHOSROW SHAKOURI

作者单位: Department of Physics,Damavand Branch,Islamic Azad University,Damavand,Iran Department of Physics,Iran University of Science and Technology,Tehran,Iran

会议类型: 国际会议

会议名称: 3rd International Conference on Mechanical and Electrical Technology(ICMET2011) (2011第三届机械与电气技术国际会议)

会议地点: 大连

会议语种:英文

页码: 763-767

在线出版日期: 2011-08-26（万方平台首次上网日期，不代表论文的发表时间）