Indian Journal of Physics最新文献

First-principles calculations to investigate structural, electronic, elastic, and optical properties of orthorhombic LiBH2 for hydrogen storage and optoelectronic devices

IF 1.6 4区物理与天体物理

Indian Journal of Physics Pub Date : 2024-11-16 DOI: 10.1007/s12648-024-03488-7

Saadi Berri

{"title":"First-principles calculations to investigate structural, electronic, elastic, and optical properties of orthorhombic LiBH2 for hydrogen storage and optoelectronic devices","authors":"Saadi Berri","doi":"10.1007/s12648-024-03488-7","DOIUrl":"10.1007/s12648-024-03488-7","url":null,"abstract":"<div>In the current investigation, we have implemented first-principles calculations to examine the structural, elastic, electrical, and optical characteristics of LiBH2. All of the calculations were performed using first-principles density functional theory (DFT). The space group Pnma (62) has been used. The obtained results regarding the lattice parameters of the material of interest are found to be within 2% slighter than those of the experiment. The dispersion curve shows that LiBH2 is a semiconductor with an indirect band gap of 0.978 eV along the Y–Γ direction. The optical parameters like dielectric function ε(ω), reflectivity R(ω), index of refraction n(ω), coefficients of extinction k(ω), and absorption α(ω) are determined and explained. In this regard, LiBH2 has shown promise on hydrogen storage applications in account of its high hydrogen volume density of 94.85 g/L (more than that of liquid hydrogen), and a gravimetric hydrogen density of 10.12 wt.%, fulfilling the standard set by US-DOE for 2025.</div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"99 4","pages":"1261 - 1271"},"PeriodicalIF":1.6,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143688300","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 effects of nanoparticles on pool boiling and critical heat flux

IF 1.6 4区物理与天体物理

Indian Journal of Physics Pub Date : 2024-11-09 DOI: 10.1007/s12648-024-03407-w

T. Srinivas, P. Adarsh Varma, Ch. Satya Priya, M. Prashanth, P. Mukesh, B. Sai Sri Nandan, G. Srinivas

{"title":"The effects of nanoparticles on pool boiling and critical heat flux","authors":"T. Srinivas, P. Adarsh Varma, Ch. Satya Priya, M. Prashanth, P. Mukesh, B. Sai Sri Nandan, G. Srinivas","doi":"10.1007/s12648-024-03407-w","DOIUrl":"10.1007/s12648-024-03407-w","url":null,"abstract":"<div>The use of nanofluids, which are aqueous fluids containing nanoparticles, facilitates the ability to increase the critical heat flux (CHF) of a system. This study conducted pool boiling experiments at 50 °C and atmospheric pressure to examine the CHF features of CuO nanoparticles, Al2O3 nanoparticles, and a hybrid of Al2O3 and CuO colloids. Ni–Cr wire is used as the primary heating element. The concentrations of nanoparticles in the base fluid varied between 0.1 and 0.5 percent by weight, with each increase representing a doubling of the previous value. From a low of roughly 2%, the critical heat flow climbed by around 19% in each of the test conditions. The appearance of a nanofluid on the heating surface, which enhances surface wettability, is associated with an increase in CHF. The accumulation of nanoparticles on the surface of the heater also contributes to the increase in CHF. After attaining a peak at 17% at 0.2 weight%, the rate of CHF enhancement shown by hybrid nanofluid began to fall. These findings have important applications in thermal management systems used in nuclear reactors, electronics cooling, and other high-heat flow scenarios.</div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"99 4","pages":"1509 - 1518"},"PeriodicalIF":1.6,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143688506","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

Notes on some analytically solvable generalized constant-roll inflation models

IF 1.6 4区物理与天体物理

Indian Journal of Physics Pub Date : 2024-11-08 DOI: 10.1007/s12648-024-03339-5

Sin Chol Hwang, Kwi Jong Ko, Myong Yun

引用次数: 0

A combined integrable hierarchy with four potentials and its recursion operator and bi-Hamiltonian structure

IF 1.6 4区物理与天体物理

Indian Journal of Physics Pub Date : 2024-10-09 DOI: 10.1007/s12648-024-03364-4

Wen-Xiu Ma

引用次数: 0

One sided sequential sharing of tripartite nonlocality for pure and mixed three-qubit states

IF 1.6 4区物理与天体物理

Indian Journal of Physics Pub Date : 2024-09-28 DOI: 10.1007/s12648-024-03331-z

Sk Sahadat Hossain

{"title":"One sided sequential sharing of tripartite nonlocality for pure and mixed three-qubit states","authors":"Sk Sahadat Hossain","doi":"10.1007/s12648-024-03331-z","DOIUrl":"10.1007/s12648-024-03331-z","url":null,"abstract":"<div>Tripartite nonlocality holds significant theoretical value and has numerous applications in quantum information and computation. With dichotomic measurement settings, several aspects of tripartite nonlocality are identified by violations of the Svetlichny inequality, Mermin inequality, the 46 facet inequalities of Sliwa, and the inequalities established by Bancal et al. Silva et al. explored the concept of nonlocality sharing among multiple copies of a party. This paper focuses on determining the number of observers who can simultaneously share distinct tripartite nonlocal correlations under a one-sided sequential measurement formalism. Specifically, we examine a scenario where three spatially separated parties-Alice, Bob, and multiple Charlies-share three spin- (frac{1}{2}) particles. For multiple Charlies, we have identified constraints on (theta) (pure state) and p (mixed state), demonstrating the sequential sharing of various forms of tripartite nonlocality with a single Alice and Bob. Notably, under sequential measurement formalism, a non-maximally pure entangled state exhibits the same sharing capacity as a maximally entangled state.</div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"99 2","pages":"581 - 590"},"PeriodicalIF":1.6,"publicationDate":"2024-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143110138","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

Superparamagnetism in the decorated square and triangular Blume-Capel Ising systems by mean-field theory

IF 1.6 4区物理与天体物理

Indian Journal of Physics Pub Date : 2024-09-28 DOI: 10.1007/s12648-024-03396-w

Aqeel Raad Ghafel, Hadey K. Mohamad

{"title":"Superparamagnetism in the decorated square and triangular Blume-Capel Ising systems by mean-field theory","authors":"Aqeel Raad Ghafel, Hadey K. Mohamad","doi":"10.1007/s12648-024-03396-w","DOIUrl":"10.1007/s12648-024-03396-w","url":null,"abstract":"<div>In the molecular mean-field approximation, comparable studies have been done for decorated ferrimagnetic mixed spin square and triangular systems. Based on the Blume-Capel Ising model, it has been evaluated the results of the study. The proposed research paper has tested the square and triangular lattices for the effect of crystal fields and external magnetic fields on ferrimagnetic mixed spin-3/2 and spin-7/2 decorated devices, respectively. It is worth noting that spin-3/2 ions are located as nodal, and in the surroundings of the lattice, there are four or six other spin-7/2 ions. Therefore, one can create superparamagnetic behaviors by altering exchange interactions with various crystal fields or external magnetic fields. New features have been found that the mixed spin square or triangular decorated ferrimagnets make superparamagnetism in the different values of (K_{B} T/left| {J_{2} } right|), with fixed values of DA/|J2|= 8, DB/|J2|= − 11, and J1 = − 0.5, J2 = 1, for mixed spin square and triangular lattices, respectively.</div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"99 4","pages":"1347 - 1359"},"PeriodicalIF":1.6,"publicationDate":"2024-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143688345","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

Enhancing microstructure and magnetic properties of ribbons of Cu–Co–Ti alloy through ball milling: experimental insights and theoretical perspectives 通过球磨提高铜-钴-钛合金带的微观结构和磁性能：实验见解和理论视角

IF 2 4区物理与天体物理

Indian Journal of Physics Pub Date : 2024-09-19 DOI: 10.1007/s12648-024-03421-y

Sumit Chabri, Arijit Sinha, Madhumita Nath, Atul Bandyopadhyay, Gurudas Mandal

{"title":"Enhancing microstructure and magnetic properties of ribbons of Cu–Co–Ti alloy through ball milling: experimental insights and theoretical perspectives","authors":"Sumit Chabri, Arijit Sinha, Madhumita Nath, Atul Bandyopadhyay, Gurudas Mandal","doi":"10.1007/s12648-024-03421-y","DOIUrl":"https://doi.org/10.1007/s12648-024-03421-y","url":null,"abstract":"To create granular materials with exceptional magnetoresistance properties, immiscible alloys were ball-milled in RSP (rapid solidification processing) ribbon. A system based on copper (Cu–Co) has been investigated. For Cu–Co–Ti, a single supersaturated solid solution has been found. The addition of Ti to Cu–Co substantially increases its solid solubility. The evolution of phase (s) during rapid solidification, and mechanical alloying followed by isothermal annealing were characterized using various techniques including differential thermal analyzers, High-resolution transmission electron microscopy, and X-ray diffraction. This study extensively used the superconducting quantum interference device magnetometer to observe magnetic behavior. The Cu–Co–Ti alloy from the ball milling RSP ribbon process was annealed at 550 °C for 1 h to get the favorable combination of magnetic characteristics. An in-depth theoretical analysis of the magnetic properties was conducted through the application of the 'VAMPIRE' software package, employing Monte Carlo Simulation as the underlying methodology.","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"17 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142258220","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

Saturation effect in confined quantum systems with energy-dependent potentials 具有能量依赖势的约束量子系统中的饱和效应

IF 2 4区物理与天体物理

Indian Journal of Physics Pub Date : 2024-09-18 DOI: 10.1007/s12648-024-03403-0

Ohood Ali AL-Sbaheen, Ahmed Al-Jamel, Mohamed Ghaleb Al-Masaeed

{"title":"Saturation effect in confined quantum systems with energy-dependent potentials","authors":"Ohood Ali AL-Sbaheen, Ahmed Al-Jamel, Mohamed Ghaleb Al-Masaeed","doi":"10.1007/s12648-024-03403-0","DOIUrl":"https://doi.org/10.1007/s12648-024-03403-0","url":null,"abstract":"In this paper, we study the saturation effect in the energy or mass spectra of three quantum models with energy-dependent potentials: the harmonic oscillator, the hydrogen atom, and the heavy quarkonia. We used the method proposed in [García-Martínez (Phys Lett 373:3619, 2009)], which is based on studying various canonical point and gauge transformations applied to a function, g(x), multiplied by a given differential equation of known solutions as special orthogonal functions, that convert it into a Schrödinger-like equation. The first two models stem from implementing the method on the confluent hypergeometric differential of the well-known solutions ( _1 F_1), while the third model (heavy quarkonia) stems possibly from the hypergeometric differential of the well-known solutions ( _2 F_1). In particular, the heavy quarkonia mass spectra for both (cbar{c}) and (bbar{b}) are produced at different values of the saturation parameter (lambda ) and compared with the available experimental data. It is found that these systems may exhibit saturation effect when the energy-dependent effect is included.","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"22 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142258221","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 electrical characterization of V2O5/p-Si prepared by spray pyrolysis technique using perfume atomizer 利用香水雾化器通过喷雾热解技术制备的 V2O5/p-Si 的电学特性

IF 2 4区物理与天体物理

Indian Journal of Physics Pub Date : 2024-09-18 DOI: 10.1007/s12648-024-03424-9

Veysel Eratilla, Serif Ruzgar

{"title":"The electrical characterization of V2O5/p-Si prepared by spray pyrolysis technique using perfume atomizer","authors":"Veysel Eratilla, Serif Ruzgar","doi":"10.1007/s12648-024-03424-9","DOIUrl":"https://doi.org/10.1007/s12648-024-03424-9","url":null,"abstract":"Vanadium pentoxide (V2O5) thin films were deposited onto glass and p-type silicon substrates via spray pyrolysis by using a perfume atomizer. The surface morphology of thin film was analyzed by atomic force microscopy. Structural and optical characteristics of the deposited thin films were assessed through X-ray diffraction and UV–Vis spectroscopy, respectively. The V2O5 thin films were determined to be polycrystalline in nature, exhibiting a band gap of 2.20 eV. The semiconductor properties of V2O5 thin films deposited on glass substrates were investigated through electrical measurements conducted by using a two-probe system across a range of temperatures. Key electrical parameters such as sheet resistance, conductivity, and activation energy were deduced from these measurements. Furthermore, the electrical characteristics of the Ag/V2O5/p-Si heterojunctions were scrutinized via current–voltage (I–V) and capacitance–voltage (C–V) analyses, which exhibited pronounced rectifying behavior in the Ag/V2O5/p-Si device structure.","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"17 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142258219","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

Radiative neutron capture reaction rates for stellar nucleosynthesis 恒星核合成的辐射中子俘获反应速率

IF 1.6 4区物理与天体物理

Indian Journal of Physics Pub Date : 2024-09-17 DOI: 10.1007/s12648-024-03363-5

Vinay Singh, Debasis Bhowmick, D. N. Basu

{"title":"Radiative neutron capture reaction rates for stellar nucleosynthesis","authors":"Vinay Singh, Debasis Bhowmick, D. N. Basu","doi":"10.1007/s12648-024-03363-5","DOIUrl":"10.1007/s12648-024-03363-5","url":null,"abstract":"<div>There is a high demand for nuclear data in multidisciplinary subject like nuclear astrophysics. The two areas of nuclear physics which are most clearly related to one another are stellar evolution and nucleosynthesis. The necessity for nuclear data for astrophysical applications puts experimental methods as well as reliability and predicative ability of current nuclear models to the test. Despite recent, considerable advances, there are still significant issues and mysteries. Only a few characteristics of nuclear astrophysics are covered in the current work which include (^{52})Fe(n,(gamma ))(^{53})Fe, (^{53})Fe(n,(gamma ))(^{54})Fe, (^{54})Fe(n,(gamma ))(^{55})Fe, (^{55})Fe(n,(gamma ))(^{56})Fe, (^{56})Fe(n,(gamma ))(^{57})Fe, (^{57})Fe(n,(gamma ))(^{58})Fe and (^{58})Fe(n,(gamma ))(^{59})Fe reactions which are important in stellar nucleosynthesis. The reaction rates are calculated using nuclear statistical model. These rates are subsequently fitted to polynomials of temperature T(_9) in order to facilitate calculations for stellar nucleosynthesis.</div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"99 4","pages":"1233 - 1239"},"PeriodicalIF":1.6,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s12648-024-03363-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142258223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0