Indian Journal of Physics最新文献

Correction to: Optimizing the performance of perovskite-based organic solar cells via graphene integration as the hole transport layer: a comprehensive analysis 修正：通过石墨烯集成作为空穴传输层优化钙钛矿基有机太阳能电池的性能：综合分析

IF 1.6 4区物理与天体物理

Indian Journal of Physics Pub Date : 2025-02-10 DOI: 10.1007/s12648-024-03516-6

M. ElMasfioui, S. Bahsine, M. M. Shabat, F. Lmai, A. Elbiyaali, F. Allali

引用次数: 0

The effect of nonlinear characteristics of Rayleigh–Taylor instability with different magnetic fields 不同磁场对瑞利-泰勒不稳定性非线性特性的影响

IF 1.6 4区物理与天体物理

Indian Journal of Physics Pub Date : 2024-12-03 DOI: 10.1007/s12648-024-03423-w

M. M. Lin, M. Y. Wang, H. X. Y. Yuan, C. G. Song, Y. Yang

引用次数: 0

First-principles calculations to investigate structural, electronic, elastic, and optical properties of orthorhombic LiBH2 for hydrogen storage and optoelectronic devices 第一性原理计算研究正交LiBH2的结构、电子、弹性和光学性质，用于储氢和光电子器件

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><p>In the current investigation, we have implemented first-principles calculations to examine the structural, elastic, electrical, and optical characteristics of LiBH<sub>2</sub>. All of the calculations were performed using first-principles density functional theory (DFT). The space group <i>Pnma</i> (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 LiBH<sub>2</sub> is a semiconductor with an indirect band gap of 0.978 eV along the <i>Y–Γ</i> 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, LiBH<sub>2</sub> 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.</p></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

Investigations on magnetic and photoluminescence studies of Ni-doped CuS nanoflakes for spintronics and blue phosphor applications 自旋电子学和蓝色荧光粉中ni掺杂cu纳米片的磁致发光和光致发光研究

IF 1.6 4区物理与天体物理

Indian Journal of Physics Pub Date : 2024-11-15 DOI: 10.1007/s12648-024-03468-x

B. Sree Sesha Sudha Gayatri, N. Madhusudhana Rao

{"title":"Investigations on magnetic and photoluminescence studies of Ni-doped CuS nanoflakes for spintronics and blue phosphor applications","authors":"B. Sree Sesha Sudha Gayatri, N. Madhusudhana Rao","doi":"10.1007/s12648-024-03468-x","DOIUrl":"10.1007/s12648-024-03468-x","url":null,"abstract":"<div><p>Hydrothermal synthesis of nickel-doped copper sulfide (Cu<sub>1−x</sub>Ni<sub>x</sub>S) nanostructures was carried out using copper nitrate trihydrate, thiourea as sources of copper, sulfur, respectively, with CTAB serving as a cationic surfactant. The nanostructures were synthesised at concentrations of x = 0, 1, 3, 5, and 7 at% and then examined for their structural, optical, and magnetic characteristics. X-ray diffraction examination verified the presence of a hexagonal structure in the covellite phase, with no other phases detected. Surface morphology analysis reveals the presence of nanosphere-shaped structures resembling flowers. The UV–Vis spectroscopy investigation showed that the bandgap decreases as the concentration of Ni-doping rises. The fluorescence spectrophotometer was used to analyse the photoluminescence at room temperature. The analysed samples exhibited prominent emission peaks at wavelengths of 411 and 433 nm. The synthesised sample has significant promise for use in display technology, as shown by its color-correlation temperature (CCT) and Commission Internationale de L'Eclairage (CIE) values. Magnetic measurements showed that CuS nanostructures doped with Ni exhibited room-temperature ferromagnetism and changed to soft ferromagnetic material at higher concentrations.</p></div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"99 5","pages":"1759 - 1767"},"PeriodicalIF":1.6,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840445","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 纳米颗粒对池沸腾和临界热流密度的影响

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><p>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, Al<sub>2</sub>O<sub>3</sub> nanoparticles, and a hybrid of Al<sub>2</sub>O<sub>3</sub> 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.</p></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 几个可解析解的广义常滚膨胀模型的注释

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

Numerical study of phase transitions in the mixed-spin (1,3/2) Ashkin-Teller model with two competing dynamics 具有两个竞争动力学的混合自旋（1,3/2）Ashkin-Teller模型相变的数值研究

IF 1.6 4区物理与天体物理

Indian Journal of Physics Pub Date : 2024-11-07 DOI: 10.1007/s12648-024-03470-3

S. I. V. Hontinfinde, M. F. Gbede, M. Karimou, V. A. Kpadonou, F. Hontinfinde

引用次数: 0

Thermodynamic properties of a delta quantum dot under an electromagnetic field: the Nikiforov-Uvarova approach 电磁场下delta量子点的热力学性质：Nikiforov-Uvarova方法

IF 1.6 4区物理与天体物理

Indian Journal of Physics Pub Date : 2024-11-06 DOI: 10.1007/s12648-024-03467-y

Maurice Tiotsop, Soh Fongang Donald Bradonne, Alain Jervé Fotue

{"title":"Thermodynamic properties of a delta quantum dot under an electromagnetic field: the Nikiforov-Uvarova approach","authors":"Maurice Tiotsop, Soh Fongang Donald Bradonne, Alain Jervé Fotue","doi":"10.1007/s12648-024-03467-y","DOIUrl":"10.1007/s12648-024-03467-y","url":null,"abstract":"<div><p>In this study, we explore the thermodynamic aspects of a delta quantum dot (ΔQD) under the influence of electric and magnetic fields. By applying the Nikiforov-Uvarov approach, we derive essential thermodynamic parameters of the system, including its free energy, entropy, heat capacity, and magnetization. Understanding these properties is vital for grasping quantum dot nanostructures' dynamics and intrinsic qualities subjected to external field forces. We present detailed results and thorough discussions of the derived thermodynamic parameters, revealing their dependence on temperature and magnetic field strength. The results show a pseudo-harmonic pattern in the entropy of a delta quantum dot system, indicating distinct regimes, potential phase transitions, and their involvement in quantum coherence. Our findings shed light on the intricate interplay between electric and magnetic fields, providing valuable insights into the thermodynamic behavior of ΔQDs. This study contributes to the broader understanding of quantum dots and their potential applications in future technological advancements.</p></div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"99 5","pages":"1815 - 1824"},"PeriodicalIF":1.6,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840411","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

Anisotropic Bianchi type-(VI_{0}) wet dark fluid cosmological models in Lyra’s manifold 各向异性比安奇型- (VI_{0})天琴座流形中的湿暗流体宇宙学模型

IF 1.6 4区物理与天体物理

Indian Journal of Physics Pub Date : 2024-10-11 DOI: 10.1007/s12648-024-03412-z

H. A. Nimkar, Mohini R. Ugale

引用次数: 0

Comprehensive property study of new green halide perovskites Cs2YAgX6 via simulations 新型绿色卤化物钙钛矿Cs2YAgX6的综合性能模拟研究

IF 1.6 4区物理与天体物理

Indian Journal of Physics Pub Date : 2024-10-09 DOI: 10.1007/s12648-024-03416-9

L. Liu, X. Zhong, Q. Zhang, J. Wu, W. Zhang, B. Wu, D. Ma

{"title":"Comprehensive property study of new green halide perovskites Cs2YAgX6 via simulations","authors":"L. Liu, X. Zhong, Q. Zhang, J. Wu, W. Zhang, B. Wu, D. Ma","doi":"10.1007/s12648-024-03416-9","DOIUrl":"10.1007/s12648-024-03416-9","url":null,"abstract":"<div><p>People now pay increasing attention to the green high-performanced perovskites owing to their leadlessness and thus environmental-friendliness. Double perovskites materials emerge as promising candidates. In this study, the structural, elastic, optical, and electronic properties of Cs<sub>2</sub>YAgX<sub>6</sub> (X = Cl, Br, I) are simulated using the density functional theory. The calculated octahedral factor, tolerance factor, negative formation energy, and elastic constants confirm the structural stability of these materials according to the Born stability criterion. The electronic properties reveal indirect bandgaps of 3.68 eV, 3.11 eV, and 2.41 eV for the Cl, Br, and I substitutions, respectively. The calculated dielectric function, refractive index, reflectivity, optical absorption, conductivity, and energy loss, indicate intense absorption in the blue and ultraviolet regions (5–13 eV and 20–30 eV), suggesting potential application in blue and ultraviolet detectors. Notably, in the energy region of ~ 14-18 eV, Cs<sub>2</sub>YAgX<sub>6</sub> exhibit metallic nature. Moreover, the real refractive index is less than 1 in the 15–35 eV range, implying superluminal phase velocity and potential use as a photon accelerator in a broad spectral region. These findings indicate the potential of Cs<sub>2</sub>YAgX<sub>6</sub> as green, high-performance materials for optoelectronic applications.</p></div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"99 5","pages":"1691 - 1698"},"PeriodicalIF":1.6,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840417","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