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题名: Curvature-induced bound states and coherent electron transport on the surface of a truncated cone
作者: Du, L ;  Wang, YL ;  Liang, GH ;  Kang, GZ ;  Liu, XJ ;  Zong, HS
刊名: PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
出版日期: 2016
卷号: 76, 页码:28-34
关键词: Bound state ;  Coherent transport ;  Curvature-induced ;  Geometric potential ;  Truncated cone
学科分类: Science & Technology - Other Topics; Physics
DOI: http://dx.doi.org/10.1016/j.physe.2015.10.011
通讯作者: Zong, HS (reprint author), Nanjing Univ, Dept Phys, Nanjing 210093, Jiangsu, Peoples R China.
文章类型: Article
英文摘要: We study the curvature-induced bound states and the coherent transport properties for a particle constrained to move on a truncated cone-like surface. With longitudinal hard wall boundary condition, the probability densities and spectra energy shifts are calculated, and are found to be obviously affected by the surface curvature. The bound-state energy levels and energy differences decrease as increasing the vertex angle or the ratio of axial length to bottom radius of the truncated cone. In a two-dimensional (2D) GaAs substrate with this geometric structure, an estimation of the ground-state energy shift of ballistic transport electrons induced by the geometric potential (GP) is addressed, which shows that the fraction of the ground-state energy shift resulting from the surface curvature is unnegligible under some region of geometric parameters. Furthermore, we model a truncated cone-like junction joining two cylinders with different radii, and investigate the effect of the GP on the transmission properties by numerically solving the open-boundary 2D Schrodinger equation with GP on the junction surface. It is shown that the oscillatory behavior of the transmission coefficient as a function of the injection energy is more pronounced when steeper GP wells appear at the two ends of the junction. Moreover, at specific injection energy, the transmission coefficient is oscillating with the ratio of the cylinder radii at incoming and outgoing sides. (C) 2015 Elsevier B.V. All rights reserved.
类目[WOS]: Nanoscience & Nanotechnology ;  Physics, Condensed Matter
关键词[WOS]: QUANTUM-MECHANICS ;  CONSTRAINTS ;  PARTICLE
收录类别: SCI
项目资助者: National Natural Science Foundation of China [11047020, 11404157, 11274166, 11275097, 11475085, 11535005] ;  National Basic Research Program of China [2012CB921504] ;  Natural Science Foundation of Shandong Province of China [ZR2012AM022, ZR2011AM019] ;  Jiangsu Planned Projects for Postdoctoral Research Funds [1401113C]
语种: 英语
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/21790
Appears in Collections:理论物理所2016年知识产出_期刊论文

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Recommended Citation:
Du, L,Wang, YL,Liang, GH,et al. Curvature-induced bound states and coherent electron transport on the surface of a truncated cone[J]. PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES,2016,76:28-34.
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