Geometry effect on magnetic susceptibility of vertically coupled nanoscale InAs/GaAs quantum rings

Yiming Li*

*此作品的通信作者

研究成果: Conference contribution同行評審

1 引文 斯高帕斯(Scopus)

摘要

Geometry effect on the magnetic susceptibility of vertically coupled quantum rings (VCQRs) with three shapes of structure is numerically investigated. The theoretical model of VCQRs considers a three-dimensional effective one-electronic-band Hamiltonian with the position- and energy-dependent effective mass, the finite hard-wall confinement potential, and the Ben Daniel-Duke boundary condition. With the nonlinear iterative method, the model is solved with respect to the disk-, elliptical-, and triangular-shaped VCQRs under applied magnetic fields. For nanoscale InAs/GaAs quantum rings, electron transition energy depends on the shape and size of VCQRs; it oscillates non-periodically among the lowest electron states as a function of external magnetic fields due to the penetration of magnetic fields into the inter-regions of VCQRs. Non-periodical oscillating magnetization results in that the differential susceptibility has delta-like paramagnetic peaks. The peak depends on the geometry of structure which is contrary to conventional mesoscopic arguments. Recent development of spintronics requires an extensive study of magnetic properties of nanoscale semiconductor structures. This study provides interesting results for the magneto-optical phenomena of the nanoscale semiconductor artificial molecules.

原文English
主出版物標題2005 5th IEEE Conference on Nanotechnology
發行者IEEE Computer Society
頁面11-14
頁數4
ISBN(列印)0780391993, 9780780391994
DOIs
出版狀態Published - 2005
事件2005 5th IEEE Conference on Nanotechnology - Nagoya, Japan
持續時間: 11 七月 200515 七月 2005

出版系列

名字2005 5th IEEE Conference on Nanotechnology
1

Conference

Conference2005 5th IEEE Conference on Nanotechnology
國家/地區Japan
城市Nagoya
期間11/07/0515/07/05

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