Journal of the Korean Physical Society最新文献_第8页

Mass spectrum, root-mean-square radii, form factors, and charge radii of mesons 质谱，均方根半径，形状因子，介子的电荷半径

IF 0.9 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2025-04-18 DOI: 10.1007/s40042-025-01365-y

Nosheen Akbar, Bushra Shafaq, Sarwat Zahra, Amna Mir

{"title":"Mass spectrum, root-mean-square radii, form factors, and charge radii of mesons","authors":"Nosheen Akbar, Bushra Shafaq, Sarwat Zahra, Amna Mir","doi":"10.1007/s40042-025-01365-y","DOIUrl":"10.1007/s40042-025-01365-y","url":null,"abstract":"<div>In this work, properties of charmonium, bottomonium, and charmed-bottom mesons for S, P, and D states are calculated with the selection of suitable trial wave functions for the semi-relativistic potential model along with the incorporation of spin and spin–orbit interactions. These trial wave functions are tested by calculating the masses of ground, radial, and orbital excited states of mesons with the variational method. Relativistic effects are incorporated in the potential model through lowest order perturbation theory. The predictions for the masses of mesons show good agreement with the available experimental data and theoretical predictions found by different methods. This indicates that these trial wave functions are appropriate for the further study of mesons. These trial wave functions are used to calculate RMS radii, form factors, and charged radii. Results show that RMS radii and charge radii have inverse relation with the masses of mesons, i.e., heavier mesons have smaller radii and vice versa. Momentum dependence of the form factors is studied graphically and numerically.</div>","PeriodicalId":677,"journal":{"name":"Journal of the Korean Physical Society","volume":"86 11","pages":"1037 - 1047"},"PeriodicalIF":0.9,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145165962","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

Tunable viewing angle characteristics of QD-enhanced LED lighting through combinations of holographic diffuser and prism film 通过全息漫射和棱镜膜组合的qd增强LED照明的可调视角特性

IF 0.9 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2025-04-18 DOI: 10.1007/s40042-025-01370-1

Jaehyeong Yoo, Eunki Baek, Sohee Kim, Hyunjong Lee, Sung Min Park, Jae-Hyeon Ko

{"title":"Tunable viewing angle characteristics of QD-enhanced LED lighting through combinations of holographic diffuser and prism film","authors":"Jaehyeong Yoo, Eunki Baek, Sohee Kim, Hyunjong Lee, Sung Min Park, Jae-Hyeon Ko","doi":"10.1007/s40042-025-01370-1","DOIUrl":"10.1007/s40042-025-01370-1","url":null,"abstract":"<div>This study explores the optical properties of LED lighting devices integrating holographic diffusers, red quantum dot (QD) films, and prism films to enhance color rendering and achieve controlled luminance distribution. Holographic diffusers, with varying scattering abilities, exhibited higher transmittance and haze properties compared to traditional diffuser plates. Incorporation of a red QD film significantly improved the color rendering performance while lowering the correlated color temperature. An analysis of the angular luminance profile across different optical configurations revealed that the viewing angle characteristics can be controlled, ranging from a more collimated distribution to a Lambertian distribution. The addition of crossed prism films enhanced collimation, particularly when used in conjunction with holographic diffusers of low scattering ability, and promoted increased excitation of quantum dots, thereby enriching the red emission spectrum. The findings offer design principles for LED lighting devices with tunable viewing angles, superior color rendering, and efficient light utilization, highlighting the effective combination of holographic diffusers and prism films for diverse lighting applications.</div>","PeriodicalId":677,"journal":{"name":"Journal of the Korean Physical Society","volume":"86 11","pages":"1101 - 1107"},"PeriodicalIF":0.9,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145165961","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

Defects on a topological insulator Bi2Se3 surface studied using scanning tunneling microscope 用扫描隧道显微镜研究了拓扑绝缘体Bi2Se3表面缺陷

IF 0.9 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2025-04-17 DOI: 10.1007/s40042-025-01366-x

Zuned Ahmed, Jeongseok Woo, Sangsoo Lee, Kyung Dong Lee, Namjung Hur, Geunseop Lee

{"title":"Defects on a topological insulator Bi2Se3 surface studied using scanning tunneling microscope","authors":"Zuned Ahmed, Jeongseok Woo, Sangsoo Lee, Kyung Dong Lee, Namjung Hur, Geunseop Lee","doi":"10.1007/s40042-025-01366-x","DOIUrl":"10.1007/s40042-025-01366-x","url":null,"abstract":"<div>The native defects of Bi2Se3 were investigated using scanning tunneling microscopy (STM). STM images revealed both atomic-scale and nanometer-scale features. The most frequently observed defects appeared as depressions at the atomic scale and were identified as Se vacancies in the top Se layer. Nanometer-scale defects, including triangular, cloverleaf-shaped, and rounded features, were also observed and attributed to subsurface defects due to their extended size. While the triangular and cloverleaf-shaped defects are associated with interstitial Se atoms and substitutional Bi atoms at subsurface Se sites, respectively, the exact nature of the rounded defects remains undetermined. In addition to these point defects, previously unreported linear defects were identified. These linear defects, appearing as stripe-like features across the images, are attributed to wrinkles in the top Se layer of the Bi2Se3 surface, likely formed during sample growth and subsequently exposed by cleavage.</div>","PeriodicalId":677,"journal":{"name":"Journal of the Korean Physical Society","volume":"86 11","pages":"1077 - 1082"},"PeriodicalIF":0.9,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145166063","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

Unconventional thermal expansion in quasi-one-dimensional monoclinic (hbox {BaIrO}_3) 准一维单斜晶格中的非常规热膨胀 (hbox {BaIrO}_3)

IF 0.9 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2025-04-17 DOI: 10.1007/s40042-025-01353-2

Jinwon Jeong, Bin Chang, Han-Jin Noh, Seongsu Lee

引用次数: 0

Characterization of magnetic Bragg reflectors on YIG thin film to control spin wave transmission 控制自旋波传输的YIG薄膜上磁Bragg反射器的表征

IF 0.9 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2025-04-14 DOI: 10.1007/s40042-025-01367-w

Dongkwon Lee, Moojune Song, Kihwan Kim, Albert Min Gyu Park, Mujin You, Youngseon Soon, Kab-Jin Kim, Donghun Lee

引用次数: 0

Finite-temperature crossover in resistively shunted Josephson junctions via crossing approximations 在电阻分流约瑟夫森结有限温度交叉通过交叉近似

IF 0.8 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2025-04-14 DOI: 10.1007/s40042-025-01358-x

Ha-Nul Seok, Aaram J. Kim

引用次数: 0

Effects of heat treatment on the electrical and optical properties of amorphous oxide semiconductor films deposited by pulsed laser deposition for a high-performance transparent conducting electrode 热处理对脉冲激光沉积高性能透明导电电极非晶氧化物半导体薄膜电学和光学性能的影响

IF 0.9 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2025-04-14 DOI: 10.1007/s40042-025-01363-0

J. Vivekanandan, Sang Yeol Lee

{"title":"Effects of heat treatment on the electrical and optical properties of amorphous oxide semiconductor films deposited by pulsed laser deposition for a high-performance transparent conducting electrode","authors":"J. Vivekanandan, Sang Yeol Lee","doi":"10.1007/s40042-025-01363-0","DOIUrl":"10.1007/s40042-025-01363-0","url":null,"abstract":"<div>We report the effect of substrate temperature (room temperature (RT), 100 °C, 200 °C, 300 °C, and 400 °C) on the optical and electrical properties of amorphous oxide semiconductors (AOSs), SiInZnO (SIZO), SiZnSnO (SZTO), and InGaZnO (IGZO) thin films deposited using pulsed laser deposition (PLD). The optical properties of AOSs were observed through UV–Vis–NIR spectroscopy and photoluminescence spectroscopy. The violet emission, yellow-green emission, yellow emission, and orange-red emission band were observed in the photoluminescence study. All the films show very high transparency. The transmittance value for all the film drops approximately from 94 to 67% as the substrate temperature rises from RT to 400 °C due to increased absorption. The Hall measurement results indicated that substrate temperature greatly impacts the carrier concentration (n), carrier mobility (µ), and resistivity (ρ), of AOSs films. With rising substrate temperature, the carrier concentration increases, suggesting that certain dopant atoms at the grain boundaries may undergo thermal ionization, which can subsequently diffuse into the host lattice, thereby acting as effective dopants. The enhancement of mobility is likely due to increase in grain size. The decrease in resistivity is due to increased carrier concentration and mobility. We hope that the developed AOSs thin films having high transparency (over 94%), with a carrier concentration in the range of 2 × 10–18 cm−3 to 8.19595 × 10–19 cm−3, mobility in the range of 0.38–3.5 cm2/Vs and resistivity from 6 to 2.62 × 10–2 Ωcm can possibly be used for developing high-performance transparent conducting electrodes.</div>","PeriodicalId":677,"journal":{"name":"Journal of the Korean Physical Society","volume":"86 11","pages":"1048 - 1057"},"PeriodicalIF":0.9,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145165485","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

Green synthesis, characterization and antimicrobial activity of silver nanoparticles by using Adiantum capillus-veneris as a reducing agent 以毛茛为还原剂的绿色合成、表征及纳米银的抗菌活性

IF 0.8 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2025-04-11 DOI: 10.1007/s40042-025-01349-y

Sarfraz Khan, Yousaf Iqbal, Waqar Hussain Shah, Muhammad Shahzad Ahmed, Xinman Chen, Mostafa R. Abukhadra, Ahmed M. El-Sherbeeny

{"title":"Green synthesis, characterization and antimicrobial activity of silver nanoparticles by using Adiantum capillus-veneris as a reducing agent","authors":"Sarfraz Khan, Yousaf Iqbal, Waqar Hussain Shah, Muhammad Shahzad Ahmed, Xinman Chen, Mostafa R. Abukhadra, Ahmed M. El-Sherbeeny","doi":"10.1007/s40042-025-01349-y","DOIUrl":"10.1007/s40042-025-01349-y","url":null,"abstract":"<div>Green nanotechnology represents a recent advancement in nanoscience focusing on the biological synthesis of nanoparticles (NPs). This study utilized stem and leaf extracts from Adiantum, a medicinal plant, to reduce silver ions into silver nanoparticles (AgNPs). Green synthesis methods are considered non-toxic compared to conventional physical and chemical methods. The formation of AgNPs was monitored through color change and confirmed by UV–Vis spectroscopy. Various characterizations including Fourier transform infrared (FTIR), scanning electron microscopy (SEM), and X-ray diffraction (XRD) were conducted. SEM analysis revealed that the particle size of AgNPs ranged from 40 to 80 nm, while XRD analysis indicated a particle size range of 14–18 nm. The antimicrobial activity of the synthesized NPs was evaluated, demonstrating significant toxicity against various bacterial strains. The highest inhibition zone of 18 mm was observed against E. coli (Gram-negative), followed by Staphylococcus aureus (17 mm), Salmonella enterica (15 mm), and Pseudomonas aeruginosa (08 mm), as well as considerable antioxidant activity against DPPH with 70% inhibition. Furthermore, the green synthesis method proved to be faster in production compared to chemical methods. These environmentally friendly NPs have potential applications in diverse fields including cosmetics, food, and medical industries.</div>","PeriodicalId":677,"journal":{"name":"Journal of the Korean Physical Society","volume":"86 10","pages":"1003 - 1013"},"PeriodicalIF":0.8,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144073762","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 high-k dielectrics on enhancement-mode AlGaN/GaN MISHEMTs: performance comparison with various buffer layers for RF power electronics 高k介电体对增强模式AlGaN/GaN MISHEMTs的影响：与RF功率电子中不同缓冲层的性能比较

IF 0.8 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2025-04-10 DOI: 10.1007/s40042-025-01360-3

R. S. Venkatesan, M. Maria Dominic Savio, Ramkumar Natarajan, P. Murugapandiyan

{"title":"Impact of high-k dielectrics on enhancement-mode AlGaN/GaN MISHEMTs: performance comparison with various buffer layers for RF power electronics","authors":"R. S. Venkatesan, M. Maria Dominic Savio, Ramkumar Natarajan, P. Murugapandiyan","doi":"10.1007/s40042-025-01360-3","DOIUrl":"10.1007/s40042-025-01360-3","url":null,"abstract":"<div>This research article investigates the performance implications of incorporating high-k dielectric hafnium oxide (HfO2 ≈ 25) in enhancement-mode AlGaN/GaN high electron mobility transistors (HEMTs) with various AlGaN barrier mole function of 0.17 and 0.25 for high-speed RF power electronics using silicon carbide (SiC) substrate. This study also explores the influence of different buffer layer materials, such as AlGaN and β-Ga2O3 on device characteristics and reports a comparative analysis of DC and RF performance metrics. The use of a SiC substrate and buffer layer in GaN HEMTs significantly enhances device performance by increasing breakdown voltage, improving thermal stability, reducing defects and enhancing electron transport. The proposed heterostructure device Al0.25Ga0.75N/GaN with β-Ga2O3 buffer layer exhibited significantly higher drain current (ID) of 2.67 A/mm, transconductance (gm) of 1.204 S/mm, cut-off frequency (fT) of 32.4 GHz, breakdown voltage (VBR) of 1378 V compared to Al0.25Ga0.75N/GaN with AlGaN buffer HEMT. The proposed device drain current is 17% higher than the AlGaN buffer HEMT. The improved performance of devices with a SiC substrate and buffer layer opens new possibilities in various fields, such as power electronics, RF amplifiers, communication devices, aerospace, and defence applications.</div>","PeriodicalId":677,"journal":{"name":"Journal of the Korean Physical Society","volume":"86 10","pages":"989 - 1002"},"PeriodicalIF":0.8,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144073918","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 higher-order tidal corrections on the measurement accuracy of neutron star tidal deformability 高阶潮汐修正对中子星潮汐变形性测量精度的影响

IF 0.8 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2025-04-10 DOI: 10.1007/s40042-025-01359-w

Gyeongbin Park, Hee-Suk Cho, Chang-Hwan Lee

{"title":"Impact of higher-order tidal corrections on the measurement accuracy of neutron star tidal deformability","authors":"Gyeongbin Park, Hee-Suk Cho, Chang-Hwan Lee","doi":"10.1007/s40042-025-01359-w","DOIUrl":"10.1007/s40042-025-01359-w","url":null,"abstract":"<div>Gravitational waves emitted by binary neutron stars (BNS) provide information about the internal structure of neutron stars (NSs), helping to verify dense matter equations of state. We investigate how the measurement accuracy of NS’s tidal deformability can be improved by incorporating the higher-order post-Newtonian (pN) tidal corrections up to 7.5 pN. We assume an aligned-spin BNS system and adopt TaylorF2, which is the most commonly used pN waveform model. To calculate the measurement error, we use a semi-analytic method, Fisher matrix, which is much faster than performing parameter estimation simulations. We employ Universal Relation to remove additional parameters that appear in higher-order corrections beyond 6 pN. We find that the effect of tidal corrections shows a convergent behavior with increasing pN orders. Assuming a fiducial binary NS system whose physical parameters are compatible with GW170817, we find that the measurement error of tidal deformability decreases linearly as the effective spin increases and the tidal deformability can be better measured for stiffer equation of states.</div>","PeriodicalId":677,"journal":{"name":"Journal of the Korean Physical Society","volume":"86 10","pages":"1014 - 1022"},"PeriodicalIF":0.8,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144073920","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