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Electrophysical properties of Pb1−XMnXSe epitaxial films irradiated by γ-quanta γ-量子辐照Pb1−XMnXSe外延膜的电物理性质
IF 2.1 Q3 Physics and Astronomy Pub Date : 2020-03-01 DOI: 10.3906/fiz-1906-14
R. Madatov, R. Mamishova, M. Mamedov, J. Ismayilov, Ulviya Faradjova
Herein, the effect of γ-quanta on electrophysical and photoelectric properties of p-type Pb1-xMnx Se epitaxial films obtained from the molecular cluster on the glass substrate by the method of condensation has been investigated. It has been established that the acceptor-type local levels with the ionization energy of 0.14 eV and 0.175 eV are generated, when p-type Pb1-xMnx Se x = 0.01 epitaxial films are irradiated by γ-quanta at D >10 kGy doses. The increase in the photoconductivity in the low temperature range 80-180K is due to the discharge of 0.14eV level, but the decrease in the rate of change of photocurrent in the high temperature range is due to the role of local level with 0.175 eV energy as a recombination center.
本文研究了γ-量子对玻璃衬底上分子团簇形成的p型Pb1-xMnx-Se外延膜的电物理和光电性能的影响。研究表明,在D>10kGy剂量的γ-量子辐照下,p型Pb1-xMnx-Sex=0.01外延膜可产生电离能分别为0.14eV和0.175eV的受主型局域能级。在80-180K的低温范围内光电导率的增加是由于0.14eV能级的放电,但在高温范围内光电流变化率的降低是由于以0.175eV能量作为复合中心的局部能级的作用。
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引用次数: 0
Study of KNO scaling in the emulsion based neutrino experiments 基于乳液的中微子实验中KNO标度的研究
IF 2.1 Q3 Physics and Astronomy Pub Date : 2020-03-01 DOI: 10.3906/fiz-1912-12
Ç. Kamışcıoğlu
KNO scaling was put forward by Koba-Nielsen-Olesen in 1972 and then tested by various experiments up to now. In this paper, the data on charged hadron multiplicity moments with KNO scaling of CHORUS and OPERA, both of them emulsion-based neutrino experiments, are compared. The results are given in detail which is very useful for tuning in MC event generators.
KNO标度是Koba-Nielsen-Olesen于1972年提出的,并通过各种实验进行检验至今。本文比较了乳化剂中微子实验CHORUS和OPERA在KNO标度下的带电强子多重矩数据。给出了详细的结果,这对MC事件生成器的调优非常有用。
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引用次数: 4
Generating velocity-dependent potential in all partial waves 在所有部分波中生成速度相关势
IF 2.1 Q3 Physics and Astronomy Pub Date : 2020-03-01 DOI: 10.3906/fiz-1909-16
A. K. Behera, U. Laha, J. Bhoi
Velocity/energy-dependent potential to a parent nonlocal interaction is constructed for all partial waves by Taylor series expansion method and the related s and p-wave phase shifts for N-N and α-N systems are computed by application of modified phase equation. Our phase shifts are in good agreement with standard data.
用泰勒级数展开法构造了所有部分波与速度/能量相关的非局部相互作用势,并应用修正相方程计算了N-N和α-N体系的s波和p波相移。我们的相移与标准数据吻合得很好。
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引用次数: 2
Size-dependent electron chemical potential in nanostructures derived from statistical configuration 基于统计构型的纳米结构中尺寸相关的电子化学势
IF 2.1 Q3 Physics and Astronomy Pub Date : 2020-03-01 DOI: 10.3906/fiz-1907-27
D. Margaretta, N. Amalia, F. Utami, R. Murniati, S. Viridi, M. Abdullah
We rederived the fermion distribution function by considering the effect of assembly size. We did not use Stirling approximation to avoid the deviation generated by this approximation for a small number of constituents and small assembly size. Furthermore, we identified that in small systems, the chemical potential should also depend on the assembly size. We also rederived a general expression for the size-dependent chemical potential from a statistical configuration and showed that it is consistent with the results from previously reported theoretical or simulation methods. Finally, we applied the model to derive a size-dependent thermoelectric power factor of nanostructured materials. One important finding is that the power factor initially increases when reducing the particle size; however, it then reduces to approach zero when further reducing the material size, due to a dramatic change in the material behaviors.
通过考虑组装尺寸的影响,我们重新推导了费米子分布函数。我们没有使用斯特灵近似来避免这种近似对少量部件和小组件尺寸产生的偏差。此外,我们发现,在小型系统中,化学势也应取决于组件的大小。我们还从统计配置中重新推导了尺寸依赖性化学势的一般表达式,并表明它与先前报道的理论或模拟方法的结果一致。最后,我们应用该模型推导了纳米结构材料的尺寸相关热电功率因数。一个重要的发现是,当减小颗粒尺寸时,功率因数最初增加;然而,由于材料行为的显著变化,当进一步减小材料尺寸时,它会减小到接近零。
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引用次数: 0
A nonminimally coupled, conformally extended Einstein-Maxwell theory of pp-waves pp波的非最小耦合、共形扩展的爱因斯坦-麦克斯韦理论
IF 2.1 Q3 Physics and Astronomy Pub Date : 2020-02-21 DOI: 10.3906/fiz-2002-18
T. Dereli, Yorgo Şenikoğlu
A non-minimal coupling of Weyl curvatures to electromagnetic fields is considered in Brans-Dicke-Maxwell theory. The gravitational field equations are formulated in a Riemannian spacetime where the spacetime torsion is constrained to zero by the method of Lagrange multipliers in the language of exterior differential forms. The significance and ramifications of non-minimal couplings to gravity are examined in a pp-wave spacetime.
在Brans-Dicke-Maxwell理论中考虑了Weyl曲率与电磁场的非极小耦合。引力场方程在黎曼时空中由拉格朗日乘子的方法以外部微分形式表达,其中时空扭转被约束为零。在pp波时空中研究了引力非极小耦合的意义和分支。
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引用次数: 2
Structural and optical properties of ZnO films obtained on mesoporous Si substrates by the method of HF magnetron sputtering HF磁控溅射法在介孔硅衬底上制备ZnO薄膜的结构和光学性能
IF 2.1 Q3 Physics and Astronomy Pub Date : 2020-02-12 DOI: 10.3906/fiz-1909-10
V. Kidalov, A. Dyadenchuk, Y. Bacherikov, A. Zhuk, Tetyana Gorbaniuk, I. Rogozin, V. Kidalov
In the present work, ZnO films were obtained on mesoporous silicon substrates by the method of HF magnetron sputtering of a metallic zinc target in reaction oxygen and argon gas medium. The properties of the ZnO films obtained on mesoporous substrates were studied depending on the ratio of the partial pressures of the working gases (argon/oxygen). X-ray analysis showed that in the process of deposition, the ZnO films of a hexagonal structure were formed. The effect of the porous layer on the structural and luminescent properties of the thin ZnO films was studied. The results showed that the porous silicon substrate reduces residual stresses and can be used for obtaining high-quality ZnO films.
在反应氧和氩气介质中,采用HF磁控溅射金属锌靶的方法,在中孔硅衬底上制备了ZnO薄膜。根据工作气体(氩气/氧气)的分压比,研究了在介孔衬底上获得的ZnO薄膜的性能。X射线分析表明,在沉积过程中,形成了六方结构的ZnO薄膜。研究了多孔层对ZnO薄膜结构和发光性能的影响。结果表明,多孔硅衬底降低了残余应力,可用于获得高质量的ZnO薄膜。
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引用次数: 9
Reactive wetting of metallic/ceramic (Al/α-Al2 O3 ) systems: a parallel molecular dynamics simulation study 金属/陶瓷(Al/α- al2o3)体系反应性润湿:平行分子动力学模拟研究
IF 2.1 Q3 Physics and Astronomy Pub Date : 2020-02-12 DOI: 10.3906/fiz-1905-32
G. Aral
The reactive wetting process of a flat solid alumina (α -Al2 O3) ceramic surface by metallic aluminum (Al) nanodroplets with different shapes (spherical, cylindrical, and layer) is studied using parallel molecular dynamics (MD) simulations based on a variable charge MD method, with focuses on heat transfer, mass transfer, and the structure of the reactive region at the Al/α -Al2 O3 interface. We find that the diffusion of oxygen (O) atoms from the substrate into the droplet leads to the formation of a continuous layer of reaction product at the interface. The diffusion length of oxygen atoms into the spherical Al droplet is found to be ~7.3 Å, and the number density of O atoms at the ~5 top layers of the substrate decreases substantially. As a result, the structural correlations near the reactive region differ considerably from those in the solid substrate. Heat generated by the exothermic reactions in the reactive region is transferred to both the substrate and the droplet. The heat transfer is found to be sensitive to droplet shape.
采用基于变电荷MD方法的平行分子动力学(MD)模拟研究了不同形状(球形、圆柱形和层状)金属铝(Al)纳米液滴对扁平固体氧化铝(α - al2o3)陶瓷表面的反应润湿过程,重点研究了Al/α - al2o3界面处的传热、传质和反应区结构。我们发现氧(O)原子从衬底扩散到液滴中导致在界面处形成连续的反应产物层。发现氧原子在球形Al液滴中的扩散长度为~7.3 Å,衬底顶层~5层的O原子数密度显著降低。因此,反应区附近的结构相关性与固体基质中的结构相关性有很大不同。在反应区由放热反应产生的热量传递给底物和液滴。热传递对液滴形状很敏感。
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引用次数: 1
Octonion form of duality-invariant field equations for dyons 二子对偶不变场方程的八元形式
IF 2.1 Q3 Physics and Astronomy Pub Date : 2020-02-12 DOI: 10.3906/fiz-1910-7
M. E. Kansu, M. Tanişli, S. Demir
The hypothetical particles dyons, which carry both electric and magnetic charges simultaneously, are widely discussed in application to electromagnetic theory and magnetohydrodynamics. Particularly, the duality-invariant field equations were suggested with suitable definitions of the dyon's electromagnetic characteristics. In this study, we propose an alternative formulation of the duality-invariant field equations for dyons based on octonion algebra. Octonions have been used to express the equations for potentials, field strengths, and sources in a more compact and consistent manner. Additionally, the octonionic form of the energy conservation law for dyons has been derived.
同时携带电荷和磁荷的假想粒子dyons在电磁理论和磁流体力学中的应用得到了广泛的讨论。特别地,提出了对偶不变场方程,并对dyon的电磁特性进行了适当的定义。在本研究中,我们提出了一种基于八元代数的双子对偶不变场方程的替代公式。八元数被用来以更紧凑和一致的方式表达势、场强和源的方程。此外,还推导出了dyons能量守恒定律的八离子形式。
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引用次数: 6
Frequency and voltage dependence of electrical conductivity, complex electric modulus, and dielectric properties of Al/Alq3/p-Si structure Al/Alq3/p-Si结构电导率、复电模量和介电性能的频率和电压依赖性
IF 2.1 Q3 Physics and Astronomy Pub Date : 2020-02-12 DOI: 10.3906/fiz-1907-21
I. Orak, A. Karabulut
: In order to enhance the capacitance of the Al/p-Si metal-semiconductor structure, the Alq 3 thin film was coated between these two layers using the spin coating technique as the interlayer. The electrical conductivity, real and imaginary parts of electric modulus, dielectric loss and dielectric constant parameters were examined at the room temperature by the help of admittance measurements in the 100 kHz to 1 MHz frequency range. The effect of frequency on the dielectric constant and dielectric loss values is negligible at the negative voltage values, up to about 0.8 V, and these values rapidly ascended after 0.8 V. The function of electrical modulus complex has been examined from the point of permittivity and impedance in order to clutch the contribution of the particle border on the relaxation mechanism of the materials. It is established that the examined dielectric parameters strongly correlated with the voltage and frequency. As a result, the changes in the dielectric parameters and electrical modulus due to the varying frequency were described as the results of relaxation process, polarization and surface conditions. Furthermore, it could be stated that the Alq 3 material used in the interfacial layer is a useful material which could be used in addition to the conventional materials.
为了提高Al/p-Si金属半导体结构的电容量,采用自旋镀膜技术在这两层之间涂覆alq3薄膜作为中间层。通过在100 kHz ~ 1 MHz频率范围内的导纳测量,在室温下测试了电导率、电模量的实部和虚部、介电损耗和介电常数等参数。频率对介电常数和介电损耗值的影响在负电压下可以忽略不计,在负电压下可达0.8 V左右,在负电压后这些值迅速上升。从介电常数和阻抗的角度考察了电模量复合物的函数,以便掌握粒子边界对材料弛豫机制的贡献。结果表明,所测的介电参数与电压和频率密切相关。因此,介质参数和电模量随频率变化的变化被描述为弛豫过程、极化和表面条件的结果。此外,可以声明,用于界面层的alq3材料是一种除常规材料外可使用的有用材料。
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引用次数: 5
Magnetic properties of Mn doped crystalline and amorphous Ge thin films grown on Si (111) Si(111)上生长的掺Mn晶体和非晶Ge薄膜的磁性
IF 2.1 Q3 Physics and Astronomy Pub Date : 2020-02-12 DOI: 10.3906/fiz-1909-17
İlknur GÜNDÜZ AYKAÇ, Aykut Can Önel, Burcu TOYDEMİR YAŞASUN, L. ÇOLAKEROL ARSLAN
We investigated the effects of crystalline order on the structural and magnetic properties of ultrathin Mndoped Ge thin films grown by thermal diffusion. The dopant motion which occurs during the annealing stage appears to differ considerably depending upon whether the Ge layer is in a crystalline or an amorphous state. The details of the temperature-dependent magnetization curves reveal that the a-MnGe and c-MnGe films show ferromagnetic property up to 300K and ~250K, respectively. Ferromagnetic Mn5 Ge3 thin film with weakly anisotropic in-plane magnetization is formed on amorphous Ge thin film, while weakly ferromagnetic Mn5 Gex Si3−x nanostructures are developed on crystalline Ge thin film due to diffusion of Mn atoms through the Ge layer and interact with Si substrate.
研究了晶序对热扩散法制备超薄掺杂锗薄膜结构和磁性能的影响。在退火阶段发生的掺杂运动似乎有很大的不同,这取决于Ge层是处于晶态还是非晶态。温度相关磁化曲线的细节表明,a-MnGe和c-MnGe薄膜分别在300K和~250K时表现出铁磁性。在非晶态Ge薄膜上形成具有弱各向异性平面内磁化的Mn5 Ge3铁磁性薄膜,而在晶态Ge薄膜上,由于Mn原子通过Ge层扩散并与Si衬底相互作用,形成了弱铁磁性Mn5 Gex Si3−x纳米结构。
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引用次数: 1
期刊
Turkish Journal of Physics
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