Physics of the Solid State最新文献_第8页

Electronic Structure, Elastic, and Thermodynamic Properties of AgMO3 (M = Nb, Ta) AgMO3 （M = Nb、Ta）的电子结构、弹性和热力学性质

IF 0.9 4区物理与天体物理

Physics of the Solid State Pub Date : 2024-04-01 DOI: 10.1134/S106378342360019X

K. Ganga Prasad

引用次数: 0

Tailoring the Optical Characteristics of ZnO Nanoparticles by Fe/Co Dual-Doping 通过铁/钴双掺杂调整氧化锌纳米粒子的光学特性

IF 0.9 4区物理与天体物理

Physics of the Solid State Pub Date : 2024-04-01 DOI: 10.1134/S1063783423600413

Basmah J. Alotibi, Aicha Loucif, Abdul Majid

{"title":"Tailoring the Optical Characteristics of ZnO Nanoparticles by Fe/Co Dual-Doping","authors":"Basmah J. Alotibi, Aicha Loucif, Abdul Majid","doi":"10.1134/S1063783423600413","DOIUrl":"10.1134/S1063783423600413","url":null,"abstract":"The purpose of this study was to investigate the influence of dual doping with Fe and Co on the microstructural, morphological, and optical properties of ZnO nanoparticles (NPs). Zn0.97–xFe0.03CoxO (x = 0, 0.01, 0.02, and 0.03) NPs were prepared via a solid-state reaction method using high-purity ZnO, Fe, and Co NPs. This study was performed using X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), UV-visible spectrophotometry, photoluminescence (PL), and energy-dispersive X‑ray spectroscopy (EDS). XRD analysis revealed that all samples presented a pure hexagonal wurtzite str-ucture without any trace of Fe, Co, or their oxides, indicating that the dopant ions were well-substituted Zn ions. However, some peaks appear in the spectrum of the Zn0.94Fe0.03Co0.03O sample, corresponding to the secondary spinel phases ZnCo2O4 and CoFe2O4. FE-SEM micrographs showed that all samples exhibited sphere-like particles, and their sizes, aggregation degree, and morphology were slightly influenced by the dopant content. The estimated bandgap values decreased from 3.24 eV for undoped ZnO to 3.17 eV for Zn0.95Fe0.03Co0.02O NPs and then slightly increased. Moreover, the refractive index was evaluated from the bandgap energy using Moss, Ravindra Hervé-Vandamme, and Reddy models, and then compared. The PL spectra of all samples revealed strong and sharp emission peaks in the UV region, which increased in intensity as the Co content increased.","PeriodicalId":731,"journal":{"name":"Physics of the Solid State","volume":"65 2-6","pages":"119 - 130"},"PeriodicalIF":0.9,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140569899","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Improvement in Ordered Phase Transformation Temperature of Cu75Fe05Pd20 Alloy for Advanced Engineering Applications 用于先进工程应用的 Cu75Fe05Pd20 合金有序相变温度的提高

IF 0.9 4区物理与天体物理

Physics of the Solid State Pub Date : 2024-03-08 DOI: 10.1134/S1063783423600164

Amer Bashir Ziya, Shabbar Atiq, Muawya Elhadi, Naseeb Ahmad

{"title":"The Improvement in Ordered Phase Transformation Temperature of Cu75Fe05Pd20 Alloy for Advanced Engineering Applications","authors":"Amer Bashir Ziya, Shabbar Atiq, Muawya Elhadi, Naseeb Ahmad","doi":"10.1134/S1063783423600164","DOIUrl":"10.1134/S1063783423600164","url":null,"abstract":"Cu–Fe–Pd alloys have great versatility and the promise of extensive applications across numerous fields of industry and have become a focal point of scientific inquiry and exploration. The effect of order-disorder phase transformation on structure and thermal properties has been investigated in ternary Cu75Fe05Pd20 alloy by using high-temperature X-ray diffraction and differential scanning calorimetry. High-temperature X-ray diffraction experiments for the sample pre-annealed at 723 K have revealed the formation of an L12‑type ordered structure up to 805 K and disordered face centered cubic (f.c.c.) structure above 805 K. The lattice parameter is observed to be larger than that predicted by Vegard’s rule. This is due to the fact that the addition of Fe weakens the interatomic forces in the alloy. The integrated intensity data was used to determine thermal parameters. The phase transition occurring at Tc is of the first order because a sudden change in lattice parameter and linear thermal expansion coefficient is observed. These parameters collectively suggest that the investigated alloys could be advantageous for the automobile and space industries.","PeriodicalId":731,"journal":{"name":"Physics of the Solid State","volume":"65 1","pages":"66 - 71"},"PeriodicalIF":0.9,"publicationDate":"2024-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140075294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impact of Strain in Monolayer Graphene and Related Phenomena 单层石墨烯中应变的影响及相关现象

IF 0.9 4区物理与天体物理

Physics of the Solid State Pub Date : 2024-03-08 DOI: 10.1134/S1063783424600018

Alokesh Mondal, Anup Dey, Biswajit Maiti

{"title":"Impact of Strain in Monolayer Graphene and Related Phenomena","authors":"Alokesh Mondal, Anup Dey, Biswajit Maiti","doi":"10.1134/S1063783424600018","DOIUrl":"10.1134/S1063783424600018","url":null,"abstract":"It is well established, both theoretically and experimentally, that unstrained monolayer graphene shows linear dispersion as defined by Dirac equation of massless Fermions. But, when it is subjected to anisotropic strain, the two Dirac points get shifted from their equilibrium positions and they merge when the applied strain attains a threshold value. Near the merging point, dispersion energy is found to deviate from linearity and band gap opens up turning graphene to behave as semiconductor. A detailed calculation shows that unlike normal semiconductors with direct band gap its dispersion energy is non-parabolic around the merging point and the curvature of non-parabolicity changes with the variation of the direction of the applied anisotropic strain. Not only that, the threshold value of strain for band gap opening varies periodically between specified maximum and minimum as the strain is applied in the directions further away from the zigzag edge. To study these atypical features, a generalized expression for strain induced non-linear dispersion relation of monolayer intrinsic graphene has been formulated under tight-binding approximation (TBA). Also, the band gap energy, density of states (DOS) and electron effective mass (EEM) have been determined as a function of the magnitude of strain as well as its direction of application.","PeriodicalId":731,"journal":{"name":"Physics of the Solid State","volume":"65 1","pages":"79 - 87"},"PeriodicalIF":0.9,"publicationDate":"2024-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140074956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preparation of Large-Volume, Stable Composition Polycrystalline Mixture of Binary Solid Solutions 制备大容量、成分稳定的多晶二元固溶体混合物

IF 0.9 4区物理与天体物理

Physics of the Solid State Pub Date : 2024-03-08 DOI: 10.1134/S1063783424600237

A. I. Hashimova

{"title":"Preparation of Large-Volume, Stable Composition Polycrystalline Mixture of Binary Solid Solutions","authors":"A. I. Hashimova","doi":"10.1134/S1063783424600237","DOIUrl":"10.1134/S1063783424600237","url":null,"abstract":"Here, a new method of preparing a polycrystalline mixture with a large volume of stable composition from binary solid solutions is presented. For this purpose, several holes of small diameter (0.5–1 mm) are opened at the bottom of the quartz pot prepared for melting the alloy. The upper end of the mold made of quartz, according to the geometrical structure of the mixture, is connected to the bottom of the puta in such a way that the holes in the puta remain inside it and both volumes are hermetically connected. Such a “puta-mould” system is fixed in the device in such a way that the template (mould) of the mixture is in a vertical position. Appropriate masses of the components of the solid solution are placed in a crucible and melted under high vacuum conditions. After the molten liquid becomes homogeneous, inert gas with a pressure of 0.5–0.8 atm is injected into the working volume. Due to the pressure force exerted by the gas on the surface of the liquid, it rushes through the holes and fills the mold, where it crystallizes at a high speed. The mold is placed inside a thick-walled, heat-conducting cylinder connected to a running water-cooled body of the lower end unit. This ensures that crystallization occurs at a high speed. Thus, the composition has the same value throughout the prepared mixture. Using the method, an alloy containing 10 at % Si was prepared from the Ge–Si solid solution system. Calculation of the density of samples taken from different parts of the mixture confirmed that the composition was the same throughout the mixture.","PeriodicalId":731,"journal":{"name":"Physics of the Solid State","volume":"65 1","pages":"76 - 78"},"PeriodicalIF":0.9,"publicationDate":"2024-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140074957","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Erratum to: Phase Transitions in Lead Hafnate under High Pressure 勘误：高压下铪酸铅的相变

IF 0.9 4区物理与天体物理

Physics of the Solid State Pub Date : 2024-03-08 DOI: 10.1134/S1063783423900018

M. A. Knyazeva, D. A. Andronikova, G. A. Lityagin, I. A. Bronwald, P. Parisiades, A. Majchrowski, K. Roleder, A. V. Filimonov, R. G. Burkovsky

引用次数: 0

Acoustic Phonons in a Si/Ge Supracrystal 硅/锗超晶中的声子

IF 0.9 4区物理与天体物理

Physics of the Solid State Pub Date : 2024-03-08 DOI: 10.1134/S1063783424600365

D. L. Nika, E. P. Pokatilov, N. D. Zincenco

引用次数: 0

Discrete Breathers in a Square Lattice Based on Delocalized Modes 基于失焦模式的方晶格离散呼吸器

IF 0.9 4区物理与天体物理

Physics of the Solid State Pub Date : 2023-12-08 DOI: 10.1134/S1063783423700129

E. K. Naumov, Yu. V. Bebikhov, S. V. Dmitriev

{"title":"Discrete Breathers in a Square Lattice Based on Delocalized Modes","authors":"E. K. Naumov, Yu. V. Bebikhov, S. V. Dmitriev","doi":"10.1134/S1063783423700129","DOIUrl":"10.1134/S1063783423700129","url":null,"abstract":"In recent decades, much interest has been shown in nonlinear lattice vibrations because crystalline materials are subjected to high-amplitude impacts in many fields of human activity. One of the effects of nonlinearity in discrete periodic structures is the possibility of existence of spatially localized high-amplitude vibrations, referred to as discrete breathers (DBs), or intrinsic localized modes. The problem of searching for DBs in nonlinear chains (i.e., one-dimensional crystals) can be solved in a fairly simple way, because the variety of possible DBs is small in this case. However, no general approaches to the search for DBs have been developed for high-dimension crystal lattices. Such an approach was derived based on the works by Chechin, Sakhnenko et al., who developed the theory of bushes of nonlinear normal modes, which (as applied to crystals) were later referred to as delocalized nonlinear vibrational modes (DNVMs). It has recently been noted that all known DBs can be obtained by superimposing localizing functions on DNVMs with a frequency beyond the phonon spectrum of the lattice. Since the Chechin and Sakhnenko theory makes it possible to find all possible DNVMs by considering the lattice symmetry, it has become possible to formulate the problem of determining all possible DBs in a given lattice. This approach has recently been applied with success to the search for DBs in a two-dimensional triangular lattice. The purpose of this study is to analyze and describe DBs in a two-dimensional square lattice obtained using a localizing function. As a result, new types of DBs of a square lattice are obtained, including one-dimensional DBs (i.e., those localized only in one of two orthogonal directions) and zero-dimensional DBs (i.e., those localized in two directions).","PeriodicalId":731,"journal":{"name":"Physics of the Solid State","volume":"65 1","pages":"6 - 11"},"PeriodicalIF":0.9,"publicationDate":"2023-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138557011","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Annealing on the Microstructure and Hardness of EP648 Alloy after Direct Metal Deposition 退火对直接金属沉积后 EP648 合金微观结构和硬度的影响

IF 0.9 4区物理与天体物理

Physics of the Solid State Pub Date : 2023-12-08 DOI: 10.1134/S1063783423700075

E. A. Nosova, A. V. Balyakin, M. A. Oleynik

引用次数: 0

Structural–Phase State of a Surface of Electron-Beam Treatment of a Steel Subjected to Electroexplosive Aluminizing 电爆炸渗铝钢材电子束处理表面的结构相态

IF 0.9 4区物理与天体物理

Physics of the Solid State Pub Date : 2023-12-08 DOI: 10.1134/S1063783423700051

A. V. Ionina, V. E. Gromov, S. V. Konovalov, Yu. F. Ivanov, E. A. Budovskikh, I. A. Panchenko

引用次数: 0