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Spin Accumulation in a Rashba Nanoribbon

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Communications in Theoretical Physics 2009年第7期52卷 159-162页

作者： FU Xi zhou guang-hui Department of Physics Hunan Normal University Changsha 410081 China Department of Electronics and Physics Hunan University of Science and Engineering Yongzhou 425100 China

We investigate theoretically the spin accumulation in a Rashba spin-orbit coupling (SOC) nanoribbon nonadiabatically connected to a normal *** the nanoribbon and conductor are described by a hard-wall confining *** the scattering matrix approach within the effective free-electron approximation,we have calculated the out-of-plane spin accumulation in the *** is found that the spin accumulation shifts toward the two edges of nanoribbon with the increasing of propagation ***,as the Rashba SOC strength increases the spin accumulation in the nanoribbon will be enhanced and this result may suggest us a simple method to control the spin accumulation of the system by Rashba SOC strength.

关键词： nanoribbon Rashba spin-orbit coupling spin accumlation

First-Order Correction of the Perturbed sine-Gordon Equation

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Chinese Physics Letters 1999年第2期16卷 79-81页

作者： YAN Jia-ren TANG Yi zhou guang-hui Department of Physics Hunan Normal UniversityChangsha 410081 Department of Physics Xiangtan UniversityXiangtan 411105

A new direct approach based on the Fourier transformation is developed and applied to study the perturbed sine-Gordon *** a new basis for perturbation expansion is introduced,the first-order correction is expressed in... 详细信息

关键词： functions equation correction

Soliton Perturbations for a Combined KdV-MKdV Equation

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Chinese Physics Letters 2000年第9期17卷 625-627页

作者： YAN Jia-Ren PAN Liu-Xian zhou guang-hui Department of Physics Hu’nan Normal UniversityChangsha 410081

The soliton perturbations for the combined Korteweg de Vries and modified Korteweg de Vries(KdV-MKdV)equation are *** first-order effects of perturbation on a soliton,namely both the slow time-dependence of the solito... 详细信息

关键词： function. soliton correction

Nonlinear Gap Modes in a 1D Alternating Bond Monatomic Lattice With Anharmonicity

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Communications in Theoretical Physics 2001年第5期35卷 609-614页

作者： Pan Liu-Xian zhou guang-hui Xia Qing-Lin Yan Jia-Ren Department of Applied Physics China Center South University Changsha 410083 China

We analytically study the nonlinear localized gap modes in a one-dimensional atomic chain with uniform atomic mass but two periodically alternating force constants between the nearest neighbors by means ofa quasi-continuum *** model simulates a row of atoms in the direction of a diamond-structure type of crystals or molecular crystals with alternating double and single *** this lattice system,we find that the harmonic plus quartic anharmonic terms of inter-site potential produce a new type of nonlinear localized gap modes with a slightly asymmetry distribution of atomic *** localized gap modes are somewhat different from widely studied localized gap modes with a symmetry atomic displacement distribution in diatomic ion lattices.

关键词：晶体非筒谐性单原子晶格非线性能隙模式

Asymmetry Localized Modes in an Anharmonic Sphalerite-Structure Lattice

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Chinese Physics Letters 2000年第12期17卷 899-901页

作者： zhou guang-hui XIA Qing-Lin PAN Liu-Xian YAN Jia-Ren Department of Physics and Institute of Nonlinear Science Hunan Normal UniversityChangsha 410081 Department of Physics Yiyang Teachers CollegeYiyang 413049 International Center for Materials Physics Chinese Academy of SciencesShenyang 110015

We numerically study the intrinsic localized vibrational modes in a diatomic chain with different masses and alternating force constants between nearest *** model simulates a row of atoms in thedirection of sphalerite-structure *** found that the harmonic and quartic anharmonic terms in the nearest-neighbor interaction potential produce the intrinsic localized modes with frequencies above the optical branch or in the gap of the linear spectrum,the distribution patterns of atom amplitudes are asymmetry with a form of quasi-even-or quasi-odd-parity,and the inclusion of cubic term in the potential lowers the frequencies of the modes and introduces static displacements for the atoms.

关键词： harmonic quasi neighbor

一类新的广义集值变分包含问题解的辅助序列迭代算法

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应用数学 2007年第3期20卷 598-603页

作者：周光辉淮北煤炭师范学院数学系安徽淮北235000

本文提出并研究了Banach空间中的一类新的广义集值变分包含问题:θ∈N(w,y)+A(z,v),由集值m-增生映射的预解算子建立了广义集值变分包含与不动点问题的等价性,并利用Nadler定理和辅助序列建立了一些迭代算法,证明了解的存在性和算法的... 详细信息

本文提出并研究了Banach空间中的一类新的广义集值变分包含问题:θ∈N(w,y)+A(z,v),由集值m-增生映射的预解算子建立了广义集值变分包含与不动点问题的等价性,并利用Nadler定理和辅助序列建立了一些迭代算法,证明了解的存在性和算法的全局收敛性.

关键词：广义集值变分包含 m-增生映射预解算子辅助序列

Unraveling brain aging through the lens of oral microbiota

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Neural Regeneration Research 2025年第7期20卷 1930-1943页

作者： Qinchao Hu Si Wang Weiqi Zhang Jing Qu guang-hui Liu State Key Laboratory of Membrane Biology Institute of ZoologyChinese Academy of SciencesBeijingChina Hospital of Stomatology Guanghua School of StomatologyGuangdong Provincial Key Laboratory of StomatologySun Yat-sen UniversityGuangzhouGuangdong ProvinceChina Advanced Innovation Center for Human Brain Protection and National Clinical Research Center for Geriatric Disorders Xuanwu HospitalCapital Medical UniversityBeijingChina Aging Translational Medicine Center International Center for Aging and CancerBeijing Municipal Geriatric Medical Research CenterXuanwu HospitalCapital Medical UniversityBeijingChina CAS Key Laboratory of Genomic and Precision Medicine Beijing Institute of GenomicsChinese Academy of Sciences and China National Center for BioinformationBeijingChina University of Chinese Academy of Sciences BeijingChina Institute for Stem Cell and Regeneration Chinese Academy of SciencesBeijingChina Aging Biomarker Consortium BeijingChina State Key Laboratory of Stem Cell and Reproductive Biology Institute of ZoologyChinese Academy of SciencesBeijingChina Beijing Institute for Stem Cell and Regenerative Medicine BeijingChina

The oral cavity is a complex physiological community encompassing a wide range of *** of oral microbiota can lead to various oral infectious diseases,such as periodontitis and tooth decay,and even affect systemic health,including brain aging and neurodegenerative *** studies have highlighted how oral microbes might be involved in brain aging and neurodegeneration,indicating potential avenues for intervention *** this review,we summarize clinical evidence demonstrating a link between oral microbes/oral infectious diseases and brain aging/neurodegenerative diseases,and dissect potential mechanisms by which oral microbes contribute to brain aging and *** also highlight advances in therapeutic development grounded in the realm of oral microbes,with the goal of advancing brain health and promoting healthy aging.

关键词： Alzheimer's disease brain aging multiple sclerosis neurodegeneration neurodegenerative diseases oral microbiota Parkinson's disease periodontitis bacteria Porphyromonas gingivalis

Hilbert空间中均衡问题的迭代解(英文)

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大学数学 2007年第2期23卷 51-55页

作者：周光辉淮北煤炭师范学院数学系安徽淮北235000

研究的均衡问题(EP)是指:找x∈C,使F(x,y)≥0,y∈C.文中构造了Hilbert空间中均衡问题解的迭代序列{xn}并证明了存在均衡解x~,使得{xn}弱收敛于x^(n→+∞),所得结果包含Moudafi的已有结果作为特殊情形.

关键词：均衡单调上半连续

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电磁波辐照下量子线的电子自旋极化输运性质

物理学报 2007年第3期56卷 1649-1654页

作者：肖贤波李小毛周光辉江西农业大学物理系南昌330045 湖南师范大学物理系长沙410081

理论上研究Rashba自旋-轨道相互作(SOI)量子线在外电磁波辐照下的电子自旋极化输运性质.在自由电子模型下利用散射矩阵方法,发现当RashbaSOI较弱时,自旋极化率与外电磁场频率和电子入射能量无关,而当RashbaSOI较强时,自旋极化率则强烈... 详细信息

理论上研究Rashba自旋-轨道相互作(SOI)量子线在外电磁波辐照下的电子自旋极化输运性质.在自由电子模型下利用散射矩阵方法,发现当RashbaSOI较弱时,自旋极化率与外电磁场频率和电子入射能量无关,而当RashbaSOI较强时,自旋极化率则强烈依赖于外场频率和电子入射能量,其物理根源是RashbaSOI使子带混合引起的.此外,当电子的入射能量增加到打开另一通道阈值时,电子的透射率出现一个反常的台阶结构,这来源于电子与光子的非弹性散射而使电子在子带间的跃迁.

关键词：量子线电磁波自旋极化输运散射矩阵