Journal of the Korean Physical Society最新文献_第2页

Bragg coherent X-ray diffraction imaging of the Sn tip in VLS-grown Sn-ITO nanostructures vls生长Sn- ito纳米结构中Sn尖端的Bragg相干x射线衍射成像

IF 1 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2026-06-22 DOI: 10.1007/s40042-026-01675-9

Seonghyun Han, Do Young Noh, Sukjune Choi, Su Yong Lee, Chan Kim, Hyon Chol Kang

引用次数: 0

High-speed dynamic interlock and noise-resilient signal conditioning for PLC-based pulse modulators at PAL-XFEL PAL-XFEL中基于plc的脉冲调制器的高速动态联锁和抗噪声信号调理

IF 1 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2026-06-19 DOI: 10.1007/s40042-026-01668-8

Sang-Hee Kim, Chang-Ki Min, Jaeyu Lee

{"title":"High-speed dynamic interlock and noise-resilient signal conditioning for PLC-based pulse modulators at PAL-XFEL","authors":"Sang-Hee Kim, Chang-Ki Min, Jaeyu Lee","doi":"10.1007/s40042-026-01668-8","DOIUrl":"10.1007/s40042-026-01668-8","url":null,"abstract":"<div>This paper presents hardware and circuit-level enhancements to the programmable logic controller (PLC)-based control system for 51 high-power pulse modulators at the Pohang Accelerator Laboratory X-ray Free Electron Laser (PAL-XFEL) facility. The system addresses two critical operational challenges: severe electromagnetic interference (EMI) from thyratron switching and stringent dynamic interlock response-time requirements in a 60 Hz environment. An Analog Signal Filter Module (ASFM) was developed to convert noisy analog signals (beam voltage, beam current, and end-of-line clipper current) into stable DC outputs via multi-point sampling. The entire signal processing cycle is completed within approximately 11 µs. To meet the critical interlock response requirement of less than 2 ms, conventional mechanical relay modules were replaced with custom high-speed optical converter boards employing TLP620 photocouplers, and analog-to-digital conversion timing was optimized. These modifications reduced the total interlock response time from 15.4 ms to approximately 1.7 ms, ensuring rapid shutdown of the capacitor-charging power supply upon fault detection. The integrated solution improves operational reliability, stability, and safety while providing a cost-effective alternative to standalone high-speed interlock hardware. However, the system’s performance is currently validated primarily under 60 Hz operation; scalability to higher repetition rates and the long-term reliability of the optical components under continuous EMI exposure remain limitations that require future investigation.</div>","PeriodicalId":677,"journal":{"name":"Journal of the Korean Physical Society","volume":"89 7","pages":"751 - 764"},"PeriodicalIF":1.0,"publicationDate":"2026-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149022989","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

Electronic, magnetic, and spin-dependent thermoelectric transport properties of Fe(NO(_3))(_3)-adsorbed monolayer germanene Fe(NO (_3)) (_3)吸附单层锗烯的电子、磁性和自旋相关热电输运性质

IF 1 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2026-06-19 DOI: 10.1007/s40042-026-01674-w

Nguyen Thi Han, Vo Khuong Dien

{"title":"Electronic, magnetic, and spin-dependent thermoelectric transport properties of Fe(NO(_3))(_3)-adsorbed monolayer germanene","authors":"Nguyen Thi Han, Vo Khuong Dien","doi":"10.1007/s40042-026-01674-w","DOIUrl":"10.1007/s40042-026-01674-w","url":null,"abstract":"<div>We present a first-principles study of Fe(NO(_3))(_3)-functionalized monolayer germanene, focusing on its structural stability, electronic structure, magnetism, and spin-dependent thermoelectric transport. Fe(NO(_3))(_3) is weakly adsorbed on germanene and preserves the buckled honeycomb lattice, indicating a physisorption-dominated interaction. Nevertheless, interfacial charge transfer produces moderate p-type doping and induces a total magnetic moment of 4.3 (mu _B), mainly localized on the Fe atom. Bader charge analysis confirms a net electron transfer of about 0.71 e from germanene to Fe(NO(_3))(_3), with stronger charge depletion in the upper Ge sublayer near the adsorption interface. Band-unfolding and projected density of states analyses show that the Dirac cone of germanene is largely retained, while Fe-derived spin-polarized 3d states emerge near the Fermi level. These electronic changes lead to spin-dependent transport coefficients, a modified Seebeck response, and enhanced (PF/tau ) and electronic figure of merit (ZT_e). The results highlight superhalogen adsorption as a noncovalent strategy for introducing coupled charge-transfer, magnetic, and spin-dependent thermoelectric functionalities into germanene.</div>","PeriodicalId":677,"journal":{"name":"Journal of the Korean Physical Society","volume":"89 7","pages":"784 - 791"},"PeriodicalIF":1.0,"publicationDate":"2026-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149022990","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

Large AdS black holes from QFT QFT中的大AdS黑洞

IF 1 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2026-06-19 DOI: 10.1007/s40042-026-01671-z

Sunjin Choi, Joonho Kim, Seok Kim, June Nahmgoong

引用次数: 0

Optical properties of Fe2Mn2O7 pyrochlore ceramic and its photocatalytic performance in rhodamine B dye degradation applications Fe2Mn2O7焦绿陶瓷的光学性质及其在罗丹明B染料降解中的光催化性能

IF 1 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2026-06-18 DOI: 10.1007/s40042-026-01684-8

Kuldeep Singh, Manjeet Rani, Mahesh Kumar Yadav, Neeraj Panwar

{"title":"Optical properties of Fe2Mn2O7 pyrochlore ceramic and its photocatalytic performance in rhodamine B dye degradation applications","authors":"Kuldeep Singh, Manjeet Rani, Mahesh Kumar Yadav, Neeraj Panwar","doi":"10.1007/s40042-026-01684-8","DOIUrl":"10.1007/s40042-026-01684-8","url":null,"abstract":"<div>We hereby report the hitherto unexplored optical properties of the Fe2Mn2O7 (FMO) pyrochlore compound synthesized by the solid-state reaction route. The compound parades a monoclinic structure when confirmed by the X-ray diffraction patterns. The optical energy band gap of the material was calculated from the reflectance spectrum and was found to be 1.83 eV. This compound showed higher reflectance in the UV range in comparison to that in the visible region. This makes this compound an effective candidate for blocking the harmful UV portion of the electromagnetic spectrum, which is hazardous to human health. Analysis of the extinction coefficient (k), skin depth (δ), and refractive index (n) over 200–800 nm reveals that FMO displays strong optical activity in the UV region while showing weaker interaction with visible light. These characteristics underscore its potential for UV-blocking applications and its applicability in optical and photocatalytic systems. In the study, the real and imaginary components of the dielectric constant, as well as the loss factor, were estimated and discussed. The photocatalytic performance was evaluated by monitoring the degradation of rhodamine B (RhB) in aqueous solution using FMO under visible-light irradiation, where the material achieved an 80.35% degradation efficiency under sunlight.</div>","PeriodicalId":677,"journal":{"name":"Journal of the Korean Physical Society","volume":"89 7","pages":"809 - 819"},"PeriodicalIF":1.0,"publicationDate":"2026-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149022991","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

Vortex pinning and dynamical behavior in Nb–InAs composite thin films compared with Nb 与Nb相比，Nb - inas复合薄膜的涡旋钉钉和动力学行为

IF 1 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2026-06-17 DOI: 10.1007/s40042-026-01681-x

Tae Jong Hwang

{"title":"Vortex pinning and dynamical behavior in Nb–InAs composite thin films compared with Nb","authors":"Tae Jong Hwang","doi":"10.1007/s40042-026-01681-x","DOIUrl":"10.1007/s40042-026-01681-x","url":null,"abstract":"<div>The vortex pinning and vortex dynamics of Nb–InAs composite thin films containing vertically aligned InAs nanorods were systematically investigated using combined analyses of pinning force scaling and activation energy. The field dependence of the activation energy Ueff exhibits two distinct regimes, characterized by relatively weak field dependence at low fields and significantly stronger field dependence at higher fields. The corresponding exponent α increases from values close to unity at low fields to substantially larger values at higher fields, suggesting a crossover in vortex dynamics. Dew–Hughes scaling analysis further indicates that a single-component description is insufficient to reproduce the full field dependence of the normalized pinning force density, particularly in the high-field region where the decrease in pinning force becomes more gradual. This behavior is more consistently described using a two-component model with peak positions near b ≈ 0.35 and b ≈ 0.6, implying the coexistence of different pinning characteristics. The overall results suggest that the pinning force scaling mainly reflects static pinning characteristics, while Ueff provides complementary information on vortex dynamics in Nb–InAs composite thin films.</div>","PeriodicalId":677,"journal":{"name":"Journal of the Korean Physical Society","volume":"89 7","pages":"777 - 783"},"PeriodicalIF":1.0,"publicationDate":"2026-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149023004","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

Quantum dynamics and correlations in interacting bilayer arrays of Rydberg atoms 量子动力学和相互作用双层里德伯原子阵列的相关性

IF 1 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2026-06-16 DOI: 10.1007/s40042-026-01667-9

JuYoung Park, Jaewook Ahn, Minhyuk Kim

引用次数: 0

Comprehensive first-principles study of thermoelectric, electronic, optical, and stability properties in two-dimensional BiOCl 二维BiOCl热电、电子、光学和稳定性特性的综合第一性原理研究

IF 1 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2026-06-12 DOI: 10.1007/s40042-026-01672-y

Yadgar Hussein Shwan, Majida Ali Ameen, Aras Saeed Mahmood

{"title":"Comprehensive first-principles study of thermoelectric, electronic, optical, and stability properties in two-dimensional BiOCl","authors":"Yadgar Hussein Shwan, Majida Ali Ameen, Aras Saeed Mahmood","doi":"10.1007/s40042-026-01672-y","DOIUrl":"10.1007/s40042-026-01672-y","url":null,"abstract":"<div>Density functional theory (DFT) serves as a first-principles calculation to thoroughly investigate the stability of the structure and analyze the thermoelectric, thermodynamic, electronic, and optical characteristics of the 2D BiOCl structure. The computation of formation energy, along with phonon dispersion and ab initio molecular dynamics (AIMD) outcomes, confirms the structural, dynamical, and thermal stability of the BiOCl material, respectively. The power factor is improved by a large Seebeck coefficient and relatively low electronic thermal conductivity, indicating the energy conversion capability of the material. The BiOCl behaves as a semiconductor with a 2.84 eV band gap (BPE) and 3.81 eV (HSE06) according to its electronic band structure and partial density of state (PDOS) analysis. Optical analysis of BiOCl reveals strong interactions in the range of visible to ultraviolet. BiOCl has high heat capacity because of the high phonon density of states, suggesting that it has superior thermal energy storage capability. It has comparatively poor lattice thermal conductivity. The increase in entropy and the stabilization of heat capacity at high temperatures indicate a shift towards a more disordered state. The results offer important insights into the potential of BiOCl for thermal management and optoelectronic applications.</div>","PeriodicalId":677,"journal":{"name":"Journal of the Korean Physical Society","volume":"89 7","pages":"765 - 776"},"PeriodicalIF":1.0,"publicationDate":"2026-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149023003","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

Analysis of strongly relativistic ion-acoustic solitons in multicomponent plasmas comprising negative ions and non-isothermal electrons 由负离子和非等温电子组成的多组分等离子体中强相对论性离子-声孤子的分析

IF 1 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2026-06-12 DOI: 10.1007/s40042-026-01673-x

Ranjan Das

{"title":"Analysis of strongly relativistic ion-acoustic solitons in multicomponent plasmas comprising negative ions and non-isothermal electrons","authors":"Ranjan Das","doi":"10.1007/s40042-026-01673-x","DOIUrl":"10.1007/s40042-026-01673-x","url":null,"abstract":"<div>The occurrence of ion-acoustic solitons (IASs) in a multicomponent unmagnetized plasma consisting of relativistic positive ions, relativistic negative ions, and non-isothermal electrons has been studied through modified Korteweg–de Vries (mKdV) equation by utilizing reductive perturbative method (RPM). The higher-order relativistic effects for (gamma_{i,j} approx Oleft( {frac{{v_{i,j}^{4} }}{{c^{4} }}} right)) as well as more pronounced relativistic effects for (gamma_{i,j} approx Oleft( {frac{{v_{i,j}^{6} }}{{c^{6} }}} right)) in the relativistic effects (gamma_{i,j} = left( {1 - frac{{v_{i,j}^{2} }}{{c^{2} }}} right)^{{ - frac{1}{2}}}) of positive and negative ions are seen to play an important role in the formation of solitons in the warm plasma. Further, the fast and slow compressive solitons are shown to exist in both the situations (Q^{prime})(negative to positive ion mass ratio) greater and less than one for (sigma_{i}) (positive ion to electron temperature ratio), (> sigma_{j}) (negative ion to electron temperature ratio), and (sigma_{i} < sigma_{j}). The relativistic effect (gamma_{i,j} approx Oleft( {frac{{v_{i,j}^{6} }}{{c^{6} }}} right)) demonstrates higher amplitude of the solitons than the relativistic effect (gamma_{i,j} approx Oleft( {frac{{v_{i,j}^{4} }}{{c^{4} }}} right)). This model can be employed to explore the dynamics of plasmas in various contexts, including both astrophysical and laboratory settings.</div>","PeriodicalId":677,"journal":{"name":"Journal of the Korean Physical Society","volume":"89 7","pages":"740 - 750"},"PeriodicalIF":1.0,"publicationDate":"2026-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149022992","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

Calculation of radiation force in oblique beam focused ultrasonic field based on ray acoustic model 基于射线声模型的斜束聚焦超声场辐射力计算

IF 1 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2026-06-12 DOI: 10.1007/s40042-026-01676-8

Xuping Zou, Shijun Ying, Dongxing Jia

{"title":"Calculation of radiation force in oblique beam focused ultrasonic field based on ray acoustic model","authors":"Xuping Zou, Shijun Ying, Dongxing Jia","doi":"10.1007/s40042-026-01676-8","DOIUrl":"10.1007/s40042-026-01676-8","url":null,"abstract":"<div>In this research, a novel correlation between the radiation force and sound power in an obliquely focused ultrasonic field is proposed based on a ray acoustic model. Meanwhile, the ray acoustic model is employed to derive the numerical solution for calculating the radiation force of the obliquely focused beam. Through numerical simulation, the effects of the transducer elements of the spherical focusing probe array on target parameters, half-aperture angle, and incident angle are theoretically investigated. Additionally, a comparative analysis of the performance between the established model and the far-field integration model is conducted, and the results demonstrate that the radiation forces exerted by the two models on fully absorbing targets under different half-aperture angles are relatively consistent. This verifies that the ray acoustic model is also highly effective in the sound power correction measurement of obliquely focused beams. Furthermore, the integration model derived in this study features the simplicity of a single integral, making it more convenient in practical applications and promising for wider utilization in future practices.</div>","PeriodicalId":677,"journal":{"name":"Journal of the Korean Physical Society","volume":"89 7","pages":"798 - 808"},"PeriodicalIF":1.0,"publicationDate":"2026-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149022987","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