Results in Physics最新文献_第3页

High-sensitivity and flexible H2S gas sensor based on PVA/PEO–CoO/MoO3 nanocomposite films 基于PVA/ PEO-CoO /MoO3纳米复合膜的高灵敏度柔性H2S气体传感器

IF 4.6 2区物理与天体物理

Results in Physics Pub Date : 2026-02-01 Epub Date: 2026-01-11 DOI: 10.1016/j.rinp.2026.108583

Maha Aiiad Alenizi , Maamon A. Farea , Doaa Abdelhameed , A.Al ojeery , S.A. Al-Balawi , Al-Hakimi A. N , Tahani M. Alresheedi , M.A. Ahlam

{"title":"High-sensitivity and flexible H2S gas sensor based on PVA/PEO–CoO/MoO3 nanocomposite films","authors":"Maha Aiiad Alenizi , Maamon A. Farea , Doaa Abdelhameed , A.Al ojeery , S.A. Al-Balawi , Al-Hakimi A. N , Tahani M. Alresheedi , M.A. Ahlam","doi":"10.1016/j.rinp.2026.108583","DOIUrl":"10.1016/j.rinp.2026.108583","url":null,"abstract":"<div><div>A novel PVA/PEO–CoO/MoO<sub>3</sub> nanocomposite was successfully fabricated and evaluated as a high-performance chemiresistive gas sensor for H<sub>2</sub>S detection at room temperature. Structural and morphological analyses confirmed the successful incorporation of uniformly dispersed CoO and MoO<sub>3</sub> nanoparticles into the polymer matrix, while electrical characterization demonstrated enhanced conductivity with increasing oxide content. Among the compositions tested, the film with 15 wt% metal oxide loading (Sample S4) showed optimal sensing performance, delivering a high response of ∼ 98.9 % to 50 ppm H<sub>2</sub>S, with fast and reversible dynamics and minimal signal drift. The sensor also exhibited excellent selectivity toward H<sub>2</sub>S over other interfering gases and maintained stable performance over repeated cycles and 30 days of storage. Compared with similar systems in the literature, the proposed sensor outperforms in terms of sensitivity, selectivity, and room-temperature functionality, without requiring external heating or complex fabrication methods. These findings highlight the potential of oxide–polymer hybrid systems for the development of low-cost, flexible, and scalable gas sensors for real-world applications.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"81 ","pages":"Article 108583"},"PeriodicalIF":4.6,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145979595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Multi-variable empirical equation for critical temperature of cuprate superconductors 铜超导体临界温度的多变量经验方程

IF 4.6 2区物理与天体物理

Results in Physics Pub Date : 2026-02-01 Epub Date: 2026-01-22 DOI: 10.1016/j.rinp.2026.108576

Zakiya Al-Ruqaishi, C.H Raymond Ooi

{"title":"Multi-variable empirical equation for critical temperature of cuprate superconductors","authors":"Zakiya Al-Ruqaishi, C.H Raymond Ooi","doi":"10.1016/j.rinp.2026.108576","DOIUrl":"10.1016/j.rinp.2026.108576","url":null,"abstract":"<div><div>Among the family of cuprate superconductors with critical temperatures (<span><math><msub><mrow><mi>T</mi></mrow><mrow><mi>c</mi></mrow></msub></math></span>) above 70 K, four systems stand out: Yttrium Barium Copper Oxide, Bismuth Strontium Calcium Copper Oxide, Thallium Barium Calcium Copper Oxide and Mercury Barium Calcium Copper Oxide, with Hg1223 exhibiting the highest <span><math><msub><mrow><mi>T</mi></mrow><mrow><mi>c</mi></mrow></msub></math></span> around 135 K, surpassing the rest, which range between 70 K and 120 K. This work analyzes the structural, compositional and chemical factors crucial for determining the <span><math><msub><mrow><mi>T</mi></mrow><mrow><mi>c</mi></mrow></msub></math></span> of cuprate superconductors. We have devised a method to obtain a unified empirical equation for <span><math><msub><mrow><mi>T</mi></mrow><mrow><mi>c</mi></mrow></msub></math></span> based on systematic data analysis of seven physical variables identified from the correlation plots. Our investigation into the multivariable dependencies and their interrelations shed light on the underlying physical mechanism of high <span><math><msub><mrow><mi>T</mi></mrow><mrow><mi>c</mi></mrow></msub></math></span> superconductivity. Key parameters include electronic configuration, the positional significance of cations in the A-O layer of the periodic table (<span><math><mi>BiO</mi></math></span>, <span><math><mi>HgO</mi></math></span>, or <span><math><mi>TlO</mi></math></span> layers), electronegativity, crystal unit cell volume, and the architecture or the structural composition. Our analysis reveals that small unit cell volume, small value of the product of transverse distance between interacting layers <span><math><mi>ζ</mi></math></span> and small interaction-charge length <span><math><mi>ℓ</mi></math></span>, and high energy gap significantly influence the interaction between charges, contributing to the large <span><math><msub><mrow><mi>T</mi></mrow><mrow><mi>c</mi></mrow></msub></math></span> of Hg1223.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"81 ","pages":"Article 108576"},"PeriodicalIF":4.6,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146170491","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Breaking the loss barrier in CCTO: sol–gel tin enables high permittivity with capacitor-grade loss tangent 在CCTO：溶胶-凝胶锡中打破损耗势垒，可以实现具有电容级损耗正切的高介电常数

IF 4.6 2区物理与天体物理

Results in Physics Pub Date : 2026-02-01 Epub Date: 2026-01-12 DOI: 10.1016/j.rinp.2026.108584

Sasitorn Putjuso , Anuchit Hunyek , Sunan Nonglek , Thanin Putjuso

{"title":"Breaking the loss barrier in CCTO: sol–gel tin enables high permittivity with capacitor-grade loss tangent","authors":"Sasitorn Putjuso , Anuchit Hunyek , Sunan Nonglek , Thanin Putjuso","doi":"10.1016/j.rinp.2026.108584","DOIUrl":"10.1016/j.rinp.2026.108584","url":null,"abstract":"<div><div>Sn-doped CaCu<sub>3</sub>Ti<sub>4</sub>O<sub>12</sub> (CCTO) ceramics were synthesized by a sol–gel polymerization route using tin (II) acetate and low-temperature sintering (1015–1020 °C) to overcome the long-standing trade-off between colossal permittivity and dielectric loss (tan δ). Unlike solid-state processing, the sol–gel method yields small-grained, densely packed microstructures that reinforce grain-boundary (GB) barriers within the internal-barrier-layer-capacitor (IBLC) framework. Cu/Ti K-edge XANES confirms Cu<sup>2+</sup> as the dominant species with only trace Cu<sup>+</sup>, while the Ti<sup>3+</sup> fraction increases with Sn incorporation, evidencing mixed-valence tuning that governs electron hopping and GB blocking. Electrical mapping reveals two regimes: an ultra-high-ε′/high-loss domain at the lower sintering limit, and an optimized-balance domain at slightly higher temperature, retaining high ε′ while driving tan δ toward capacitor-grade levels. Representative compositions deliver ε′ ≈ (4–5) × 10<sup>4</sup> with tan δ ≈ 0.06 at 1 kHz (RT)<strong>,</strong> alongside α ≈ 6–7 and E<sub>b</sub> ≈ (1–2) × 10<sup>3</sup> V.cm<sup>−1</sup>. The results establish Sn incorporation through a reduced-temperature sol–gel route as a mechanistically grounded, low-thermal-budget strategy for achieving low-loss, high-ε′ CCTO ceramics suitable for MLCC-relevant applications.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"81 ","pages":"Article 108584"},"PeriodicalIF":4.6,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145979594","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 glass composition on physical, mechanical and radiation shielding performance of Barium Bismuth Boro-tellurite glasses 玻璃成分对钡铋硼碲玻璃物理、机械及辐射屏蔽性能的影响

IF 4.6 2区物理与天体物理

Results in Physics Pub Date : 2026-02-01 Epub Date: 2026-01-14 DOI: 10.1016/j.rinp.2026.108586

Shreeshmal Bhavya , Sachin Shet , K.R. Vighnesh , R. Kiran , Ashwitha Nancy D’Souza , L. Ramu , Srinivas Shenoy Heckadka , Sudha D. Kamath

{"title":"Effect of glass composition on physical, mechanical and radiation shielding performance of Barium Bismuth Boro-tellurite glasses","authors":"Shreeshmal Bhavya , Sachin Shet , K.R. Vighnesh , R. Kiran , Ashwitha Nancy D’Souza , L. Ramu , Srinivas Shenoy Heckadka , Sudha D. Kamath","doi":"10.1016/j.rinp.2026.108586","DOIUrl":"10.1016/j.rinp.2026.108586","url":null,"abstract":"<div><div>This study explores the role of compositional variation on the structural, mechanical, and radiation attenuation characteristics of Bismuth Barium Boro-tellurite (BBBT) glasses. Samples were synthesized via the melt-quench technique and compositional variations were correlated with physical and mechanical parameters. Elastic moduli were estimated using the Makishima-Mackenzie model, while photon shielding factors such as mass attenuation coefficient (MAC), linear attenuation coefficient (LAC), half value layer (HVL), mean free path (MFP), and tenth value layer (TVL) were computed over 0.015–15 MeV using Phy-X/PSD. Increasing bismuth oxide (Bi<sub>2</sub>O<sub>3</sub>) content enhanced gamma attenuation through density augmentation but reduced optical transparency. To address this, cerium oxide (CeO<sub>2</sub>) was incorporated as a rare earth modifier, restoring transparency without compromising shielding performance. Further, theoretical neutron shielding estimation studies have been carried out using Monte-Carlo based simulation tool MCNP, which provided insight towards the behaviour of shielding with the glass density as well as composition which includes high neutron capture elements. The results demonstrate that compositional tailoring of BBBT glasses enables dual optimization of transparency and radiation protection, offering Pb-free materials for advanced medical shielding.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"81 ","pages":"Article 108586"},"PeriodicalIF":4.6,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146024158","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Atomistic tight-binding computations in electronic structures and optical signatures of wurtzite structured InAs and InP nanocrystals 纤锌矿结构InAs和InP纳米晶体的电子结构和光学特征的原子紧密结合计算

IF 4.6 2区物理与天体物理

Results in Physics Pub Date : 2026-02-01 Epub Date: 2026-01-11 DOI: 10.1016/j.rinp.2026.108585

Pruet Kalasuwan , Worasak Sukkabot

引用次数: 0

Green-synthesized ZnO nanoparticles incorporated into cellulose films: structural, optical, antibacterial, and cytocompatibility evaluation for wound dressing applications 绿色合成的氧化锌纳米颗粒纳入纤维素薄膜：结构、光学、抗菌和细胞相容性评估伤口敷料应用

IF 4.6 2区物理与天体物理

Results in Physics Pub Date : 2026-02-01 Epub Date: 2025-12-31 DOI: 10.1016/j.rinp.2025.108565

Sanaz Alamdari , Seyedeh Marziyeh Khademi Tabatabaee , Ahmad Farhad Talebi , Zahra Nazemi , Mohammad Mahdi Hosseinieh Farahani , Danial Moradi , Maryam Hajiebrahimi , Dmitry Albov , Pavol Hvizdos , Omid Mirzaee

{"title":"Green-synthesized ZnO nanoparticles incorporated into cellulose films: structural, optical, antibacterial, and cytocompatibility evaluation for wound dressing applications","authors":"Sanaz Alamdari , Seyedeh Marziyeh Khademi Tabatabaee , Ahmad Farhad Talebi , Zahra Nazemi , Mohammad Mahdi Hosseinieh Farahani , Danial Moradi , Maryam Hajiebrahimi , Dmitry Albov , Pavol Hvizdos , Omid Mirzaee","doi":"10.1016/j.rinp.2025.108565","DOIUrl":"10.1016/j.rinp.2025.108565","url":null,"abstract":"<div><div>In this study, zinc oxide nanoparticles (ZnO NPs) were green-synthesized using <em>Hibiscus sabdariffa</em> extract and incorporated into cellulose-based films to enhance their structural, optical, and biological performance for wound dressing applications. Two composite formulations containing 1 wt.% and 1.5 wt.% ZnO (relative to cellulose) were fabricated and evaluated. The calcined ZnO NPs exhibited a crystallite size of 36.98 nm, confirmed by XRD, and were uniformly distributed within the cellulose matrix. UV–Vis and PL analyses revealed that the natural <em>Hibiscus</em> pigments contributed to improved light absorption and defect-related emissions. The films demonstrated strong antibacterial activity, with inhibition zone diameters of 23.33 mm against <em>Escherichia coli (E. coli)</em> and 19.67 mm against <em>Staphylococcus aureus</em> (<em>S. aureus)</em>. MIC and MBC values ranged from 1562–3125 µg/mL depending on bacterial strain and ZnO content. Cytocompatibility tests on fibroblasts showed that incorporation of ZnO induced a moderate, time-dependent cytotoxic response, while maintaining viability levels acceptable for antimicrobial surface application. The Cel–ZnO 1.5 % film exhibits the highest swelling but the lowest moisture-retention stability. Prepared ZnO–cellulose composites provided the optimal balance of antibacterial efficacy and cytocompatibility, indicating its strong potential as a functional wound dressing material.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"81 ","pages":"Article 108565"},"PeriodicalIF":4.6,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146078697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Constraining nonminimal fT gravity from Primordial Nucleosynthesis to Late-Universe observations 从原始核合成到晚期宇宙观测的约束非极小fT引力

IF 4.6 2区物理与天体物理

Results in Physics Pub Date : 2026-02-01 Epub Date: 2026-01-15 DOI: 10.1016/j.rinp.2026.108587

Yahia Al-Omar , Majida Nahili , Nidal Chamoun

{"title":"Constraining nonminimal fT gravity from Primordial Nucleosynthesis to Late-Universe observations","authors":"Yahia Al-Omar , Majida Nahili , Nidal Chamoun","doi":"10.1016/j.rinp.2026.108587","DOIUrl":"10.1016/j.rinp.2026.108587","url":null,"abstract":"<div><div>We present a multi-epoch test of <span><math><mrow><mi>f</mi><mo>(</mo><mi>T</mi><mo>)</mo></mrow></math></span> gravity with nonminimal torsion–matter coupling, combining early- and late-Universe observations. At the MeV scale, Big-Bang Nucleosynthesis constrains the fractional variation of the weak freeze-out temperature, <span><math><mrow><mrow><mo>|</mo><mi>δ</mi></mrow><msub><mi>T</mi><mi>f</mi></msub><mo>/</mo><msub><mi>T</mi><mi>f</mi></msub><mrow><mo>|</mo></mrow></mrow></math></span>, thereby mapping light-element abundances into limits on deviations from the standard expansion history. At low redshift, we confront the model with type Ia supernovae, baryon acoustic oscillations, and cosmic-chronometer data, which respectively probe distances, the late-time standard ruler, and the Hubble rate. Independent analyses highlight the complementary roles of each dataset, while a joint SNe Ia + BAO + CC fit breaks degeneracies and yields the tightest combined bounds. As an illustration, we examine two representative torsion-modified gravity scenarios: BBN strongly limits large departures from standard cosmology, whereas late-time probes remain compatible with a near-ΛCDM background. This unified approach demonstrates the power of linking early-Universe nuclear physics with precision cosmological observables in assessing torsional extensions of gravity.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"81 ","pages":"Article 108587"},"PeriodicalIF":4.6,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146024159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Multifunctional reconfigurable microwave photonic arbitrary waveform generator based on DP-MZM and polarization control 基于DP-MZM和偏振控制的多功能可重构微波光子任意波形发生器

IF 4.6 2区物理与天体物理

Results in Physics Pub Date : 2026-02-01 Epub Date: 2025-12-19 DOI: 10.1016/j.rinp.2025.108549

Mo Chen , Hongyao Chen , HongYu Zhang , ZhuoYang Li , SongYu Zhang , Jianping Wang , LiFang Feng , HuiMin Lu , DanYang Chen , Jianli Jin

{"title":"Multifunctional reconfigurable microwave photonic arbitrary waveform generator based on DP-MZM and polarization control","authors":"Mo Chen , Hongyao Chen , HongYu Zhang , ZhuoYang Li , SongYu Zhang , Jianping Wang , LiFang Feng , HuiMin Lu , DanYang Chen , Jianli Jin","doi":"10.1016/j.rinp.2025.108549","DOIUrl":"10.1016/j.rinp.2025.108549","url":null,"abstract":"<div><div>his paper presents a reconfigurable microwave photonic arbitrary waveform generator based on a dual-parallel Mach–Zehnder modulator (DP-MZM) integrated with a polarization control structure. The proposed system enables the flexible generation of both fundamental signal waveforms—such as triangular waves, square waves, and Sinc-Nyquist pulses—and complex vector RF signals, including dual-frequency phase-coded waveforms and complementary linearly chirped microwave waveform (LCMW) pairs, without altering the underlying system architecture. By cascading carrier-suppressed modulation with polarization manipulation, the system supports dynamic switching between frequency doubling and quadrupling, while simultaneously allowing independent tuning of the power and phase (in-phase/anti-phase) relationships of the Fourier frequency components with a 1:2:3 frequency ratio. Furthermore, leveraging the spectral shaping and time–frequency mapping capabilities of an optical frequency comb, the system concurrently synthesizes dual-frequency phase-coded signals and complementary LCMW pairs. The simulation results demonstrate that the normalized mean error in time domain for basic waveforms (e.g., triangular and square waves) remain below 5.17 %. The generated dual-frequency phase-coded signal achieves a pulse compression ratio (PCR) close to the theoretical limit of 13 and a peak-to-sidelobe ratio (PSR) better than 9 dB, maintaining robust decoding performance even under moderate DC bias drift and polarization leakage. The synthesized complementary LCMW pairs exhibit a PCR approaching 2000, indicating excellent performance. These findings highlight the system’s potential for deployment in multifunctional photonic radar and RoF applications.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"81 ","pages":"Article 108549"},"PeriodicalIF":4.6,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145928962","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

High harmonic generation and wave mixing in graphene quantum dots by bichromatic laser fields of circular polarization 圆偏振双色激光场在石墨烯量子点中的高谐波产生和波混频

IF 4.6 2区物理与天体物理

Results in Physics Pub Date : 2026-02-01 Epub Date: 2026-01-05 DOI: 10.1016/j.rinp.2026.108579

H.K. Avetissian, A.G. Ghazaryan, G.F. Mkrtchian, Kh.V. Sedrakian

引用次数: 0

Hydrogen-passivated AlGaN/GaN HEMTs: fabrication and electrical characterization under-proton irradiation 氢钝化AlGaN/GaN hemt：质子辐照下的制备和电学表征

IF 4.6 2区物理与天体物理

Results in Physics Pub Date : 2026-02-01 Epub Date: 2026-01-04 DOI: 10.1016/j.rinp.2026.108577

Gang San Yun , Jin Park , Won Suk Koh , Soo Bean Song , Kyeong Min Lim , Sang Ho Lee , Young Jun Yoon , In Man Kang

{"title":"Hydrogen-passivated AlGaN/GaN HEMTs: fabrication and electrical characterization under-proton irradiation","authors":"Gang San Yun , Jin Park , Won Suk Koh , Soo Bean Song , Kyeong Min Lim , Sang Ho Lee , Young Jun Yoon , In Man Kang","doi":"10.1016/j.rinp.2026.108577","DOIUrl":"10.1016/j.rinp.2026.108577","url":null,"abstract":"<div><div>This study quantitatively examines the effect of hydrogen passivation on the electrical degradation of AlGaN/GaN high electron mobility transistors (HEMTs) subjected to proton irradiation. Proton exposure was conducted at an energy of 15 MeV with a fluence of 5 × 10<sup>13</sup> cm<sup>−2</sup>, and device characteristics were compared before and after irradiation. Prior to irradiation, performance differences between passivated and unpassivated devices were within 5 %. Following irradiation, unpassivated devices exhibited a 28.4 % reduction in on-current, a greater than 20 % decrease in transconductance (g<sub>m</sub>), and a 28 % increase in contact resistance (R<sub>c</sub>). In contrast, hydrogen-passivated devices demonstrated stable operation, with less than 5 % degradation in on-current, a 3 % variation in g<sub>m</sub>, and only a 4 % change in R<sub>c</sub>. These improvements are attributed to hydrogen atoms neutralizing radiation-induced defects, including donor-like and acceptor-like traps, which otherwise reduce electron mobility and increase contact resistance. By suppressing trap activation and mitigating potential fluctuations and Fermi-level pinning at the AlGaN/GaN interface, hydrogen passivation stabilizes the two-dimensional electron gas (2DEG) density and carrier transport, preserving current conduction and interfacial reliability post-irradiation. Therefore, hydrogen passivation is identified as a critical radiation-hardening strategy that effectively mitigates current degradation and contact instability in AlGaN/GaN HEMTs, providing a robust foundation for the design of GaN power devices for space and other extreme-environment applications.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"81 ","pages":"Article 108577"},"PeriodicalIF":4.6,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146024157","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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