磁场作用下非对称高斯约束势量子阱中的非极性光学束缚极化子

IF 2.9 3区 物理与天体物理 Q3 NANOSCIENCE & NANOTECHNOLOGY
F. Manfouo , S.L. Dongmo Tedo , S.J. Nobosse Nguemeta , B. Donfack , S.C.N. Nguemasson , J.V. Nguepnang , A.J. Fotue
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引用次数: 0

摘要

研究了非对称高斯约束势量子阱(AGCPQW)中弱耦合光学变形势束缚极化子在磁场作用下的性质。采用Lee-Low (LLP) Pines方法计算了ODP束缚极化子的基态能(GSE)和基态结合能(GSBE)。研究了中频、AGCPQW高度、电子-声子(e-p)耦合常数和Debye截止波数(DCOW)对GSE和GSBE的影响。结果表明,GSE是AGCPQW高度、e-p耦合常数、库仑势和DCOW的递减函数。此外,它是AGCPQW高度的展开函数。GSBE随AGCPQW高度、e-p耦合强度、库仑势和DCOW的增加而增强,而随回旋加速器频率的增加而衰减。在某些临界点上,GSE等于GSBE,这意味着自由电子和声子表现为双极化子,有助于理解超导性。研究发现,调制AGCPQW的高度、回旋频率、e-p耦合常数和DCOW可以控制AGCPQW中ODP束缚极化子的性质。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Nonpolar optical bound polaron in an asymmetrical Gaussian confinement potential quantum well under magnetic field
The properties of weak coupling optical deformation potential (ODP) bound polaron in asymmetrical Gaussian confinement potential quantum well (AGCPQW) in the presence of magnetic field (MF) has been examined. The ground state energy (GSE) and the ground state binding energy (GSBE) of ODP bound polaron are calculated following Lee-Low (LLP) Pines approach. The influence of MF, the height of AGCPQW, the electron-phonon (e-p) coupling constant and Debye cut-off wavenumber (DCOW) on the GSE and the GSBE are also studied. It is shown that the GSE is a decreasing function of height of AGCPQW, e-p coupling constant, Coulombic potential and DCOW. In addition it is an expanding function of the height of AGCPQW. We also found that the GSBE enhanced with height of AGCPQW, e-p coupling strength, Coulombic potential and DCOW, whereas it is a decayed one of the cyclotron frequency. At some critical points the GSE is equal to the GSBE meaning that the free electron and phonon behave as a double polaron helpful for the comprehension of the superconductivity. It is found that the modulation of the height of AGCPQW, the cyclotron frequency, e-p coupling constant and DCOW lead to the control of the properties of the ODP bound polaron in AGCPQW.
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来源期刊
CiteScore
7.30
自引率
6.10%
发文量
356
审稿时长
65 days
期刊介绍: Physica E: Low-dimensional systems and nanostructures contains papers and invited review articles on the fundamental and applied aspects of physics in low-dimensional electron systems, in semiconductor heterostructures, oxide interfaces, quantum wells and superlattices, quantum wires and dots, novel quantum states of matter such as topological insulators, and Weyl semimetals. Both theoretical and experimental contributions are invited. Topics suitable for publication in this journal include spin related phenomena, optical and transport properties, many-body effects, integer and fractional quantum Hall effects, quantum spin Hall effect, single electron effects and devices, Majorana fermions, and other novel phenomena. Keywords: • topological insulators/superconductors, majorana fermions, Wyel semimetals; • quantum and neuromorphic computing/quantum information physics and devices based on low dimensional systems; • layered superconductivity, low dimensional systems with superconducting proximity effect; • 2D materials such as transition metal dichalcogenides; • oxide heterostructures including ZnO, SrTiO3 etc; • carbon nanostructures (graphene, carbon nanotubes, diamond NV center, etc.) • quantum wells and superlattices; • quantum Hall effect, quantum spin Hall effect, quantum anomalous Hall effect; • optical- and phonons-related phenomena; • magnetic-semiconductor structures; • charge/spin-, magnon-, skyrmion-, Cooper pair- and majorana fermion- transport and tunneling; • ultra-fast nonlinear optical phenomena; • novel devices and applications (such as high performance sensor, solar cell, etc); • novel growth and fabrication techniques for nanostructures
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