bluuebunny/crossref_metadata_2025_split huggingface dataset:
Magnetic topological phases in the double exchange model with spin–orbit coupling
Authors: Tran Thanh-Mai Thi , Phan Van-Nham , Tran Minh-Tien 
Published: May 2024

Abstract
The double exchange model with the spin–orbit coupling is studied by the dynamical mean field theory. It reveals a competition between the magnetic, charge orderings and the non-trivial topology of the ground state. The spin exchange tends to maintain the magnetic ordering, and at the same time it tries to suppress the charge ordering. The spin–orbit coupling maintains nontrivial topology of the ground state, whereas the magnetic ordering tries to destroy it. As a result, a rich phase diagram is obtained. The competition leads to a half topological ground state, where spin-up electrons form a nontrivial topological state, while spin-down electrons are in the topological trivial insulating state.
Bouncing cosmological models in f(R, Lm) gravity
Authors: Jaybhaye Lakhan V , Solanki Raja , Sahoo P K 
Published: May 2024

Abstract
This article explores matter bounce non-singular cosmology in f(R, L

m
) gravity. We consider two non-linear f(R, L

m
) functional forms, specifically,

f
(
R
,

L

m

)
=

R

2

+
λ

R

2

+
α

L

m

and

f
(
R
,

L

m

)

=

R

2

+

L

m

β

+
γ

representing a minimal coupling case. We derive the corresponding Friedmann-like equations for both the assumed models in the FLRW background, and then we present the impact of the model parameters along with the parameter of bouncing scale factor on the equation of state parameter, pressure, and the energy density. In addition, we examine the dynamical behavior of cosmographic parameters such as jerk, lerk, and snap parameters. Further, we find that the violation of the null energy condition along with the strong energy condition depicts the non-singular accelerating behavior, corresponding to both assumed non-linear f(R, L

m
) functions. Lastly, we present the behavior of the adiabatic speed of sound to examine the viability of the considered cosmological bouncing scenario.
Performance optimization of CsPbIBr2-based perovskite solar cells through device modeling
Authors: Ullah Saad , Qamar Samina , ur Rehman Atta , Erten-Ela Sule , Khan Firoz 
Published: May 2024

Abstract
Among all-inorganic perovskite materials, CsPbIBr2 provides the optimal equilibrium between optical bandgap and phase stability. However, notwithstanding these advantageous, interfacial defects and improper band alignment continue to diminish the photovoltaic efficacy of CsPbIBr2-based PSCs. This study used the SCAPS-1D software to undertake a thorough examination of operating mechanism of CsPbIBr2-based devices. A comprehensive analysis is conducted on a range of physical parameters pertaining to the FTO/ZnOS/CsPbIBr2/CZTS configuration, encompassing doping concentration, operating temperature, defect density, electron affinity, thickness, series and shunt resistance. The simulation outcomes revealed that PSCs characterized by a low defect density and an ideal band structure enhance the performance of the devices by facilitating the transport and separation of charge carriers. The optimized device achieved an efficiency of 16.68%, short-circuits current density (JSC) of 11.52 mA cm−2, open-circuit voltage (VOC) of 1.64 V, and Fill factor (FF) of 87.83%. These simulation findings will provide useful information for experimental fabrication of efficient CsPbIBr2-based inorganic PSC.
Long-term Integration Ability of the Submillimeter Wave Astronomy Satellite (SWAS) Spectral Line Receivers
Authors: Wang Bing-Ru , Li Di , Goldsmith Paul F. , Wu Jingwen , Tsai Chao-Wei , Schieder Rudolf , Melnick Gary J. 
Published: May 2024

Abstract
The Submillimeter Wave Astronomy Satellite (SWAS) was the first space telescope capable of high spectral resolution observations of terahertz spectral lines. We have investigated the integration ability of its two receivers and spectrometer during five and a half years of on-orbit operation. The C i , O2, H2O, and 13CO spectra taken toward all observed Galactic sources were analyzed. The present results are based on spectra with a total integration time of up to 2.72 × 104 hr (≃108 s). The noise in the spectra is generally consistent with that expected from the radiometer equation, without any sign of approaching a noise floor. This noise performance reflects the extremely stable performance of the passively cooled front end as well as other relevant components in the SWAS instrument throughout its mission lifetime.
Reply to Comment on ‘Deuterium supersaturated surface layer in tungsten: ion energy dependence’
Authors: Nishijima D. , Tokitani M. , Nagata D. , Schwarz-Selinger T. , Založnik A. , Chang F. , Doerner R.P. , Patino M.I. , Simmonds M.J. , Baldwin M.J. , Tynan G.R. 
Published: May 2024

Abstract
We reply to the comment by Li et al (submitted to Nucl. Fusion with this response) on our recent paper Nishijima et al (2023 Nucl. Fusion
63 126003). In this response, we address the existence of an incident ion energy, E
i, threshold for the deuterium (D) supersaturated surface layer (DSSL) formation with a newly conducted D plasma exposure experiment at E
i ∼ 20 eV. It is also further demonstrated, based on new experiments where the ion flux, fluence, and sample temperature are scanned, that non-kinetic (ballistic) processes play a role in the DSSL formation and growth. In addition, the effect of impurities in our plasma is discussed also with a new analysis of the surface composition made after a D plasma exposure.
Neoclassical tearing mode stabilization by electron cyclotron current drive in EAST tokamak experiments
Authors: Zhang Y. , Wang X.J. , Hong F. , Zhang W. , Xu H.D. , Shi T.H. , Li E.Z. , Ma Q. , Zhao H.L. , Wang S.X. , Chu Y.Q. , Liu H.Q. , Sun Y.W. , Zhang X.D. , Yu Q. , Qian J.P. , Gong X.Z. , Hu J.S. , Lu K. , Song Y.T. ,   the EAST Team
Published: May 2024

Abstract
The stabilization of the m/n= 2/1 neoclassical tearing mode (NTM) by electron cyclotron current drive (ECCD) has been carried out in EAST H-mode discharges, where m/n is the poloidal/toroidal mode number. The experimental results are reported for the first time in this paper. To facilitate the experimental study, the magnetic island (NTM) is generated by a sufficiently large amplitude of the externally applied resonant magnetic perturbation (RMP). After switching off the RMP, the NTM exists due to the bootstrap current perturbation, with the magnetic island width being about 5 cm for the local equilibrium bootstrap current fraction being larger than 10%. By applying the localized ECCD later, the NTM is fully suppressed if the radial misalignment between the magnetic island and the ECCD location is sufficiently small. The stabilizing effect depends on both the radial misalignment and the applied electron cyclotron wave power. More importantly, it is found that the NTM can be avoided when applying ECCD earlier during the ramp-up phase of the RMP amplitude, if ECCD is localized around the O-point of the magnetic island, indicating an efficient way for avoiding locked modes that can lead to the major disruptions of tokamak plasmas.
Linear vs. Non-linear Behaviour in Ion Irradiation Nanostructuring of Nickel and Silicon Surfaces
Authors: Mekki Mogtaba B , Hunt Michael R C 
Published: May 2024

Abstract
Spontaneous nanometre-scale quasi-periodic ripple-like structures are formed at the surface of polycrystalline Ni films and Si(111) single crystal wafers by irradiation with a broad Ar+ ion beam at room temperature and studied with Atomic Force Microscopy as a function of fluence. The development of these structures can be reproduced by numerical solution of a continuum equation describing the evolution of surface morphology under ion irradiation, using realistic coefficients derived from material properties. In particular, we demonstrate that differences observed in pattern formation on the two surfaces under the conditions studied, such as wavelength stability and exponential growth of interface width for the Ni surfaces compared with wavelength coarsening and interface width saturation on Si(111), can be understood in terms of a cross-over between linear and non-linear behaviours.
Generation of Nanoparticles from FeCu Powder Using Femtosecond Laser
Authors: AlAwadhi M. , Yassine A. 
Published: May 2024

Abstract
The usage of optical force techniques such as lasers, provides contactless, and non-mechanical, microcrystal manipulation. Nanocrystalline materials are commonly produced using methods such as mechanical alloying, electrodeposition… (etc.). Bimetallic alloys and nanostructures containing Iron and Copper have been utilized for environmental solutions due to their exceptional electric and magnetic properties. The purpose of this study is to investigate the physical and optical properties of Iron Copper (FeCu) nanoparticles that are generated using femtosecond laser from Fe50Cu50 powder. Ethanol and vacuum mediums are utilized as alternative ablation mediums. Characterization of the material has been conducted through XRD, EDX and Absorption Spectroscopy. The resulted tests revealed a consistency in the iron and copper content, indicating that the material did not undergo any oxidation during the ablation processes. The absorption spectroscopy results revealed that the ablated nanoparticles resonated at a different wavelength than the bulk material, demonstrating that there was a shift in the optical properties. Additionally, the materials generated from ablation in Ethanol resulted in smaller grains compared to Vacuum ablation. Moreover, the chemical homogeneity was retained with no changes compared to the starting micron size particles which were utilized as a target for the ablation process.
Oxidative Stripping of Starch-AgNPs for Nanomolar Indirect Electrochemical Sensing of BSA Using an L-Cysteine Modified Glassy Carbon Electrode
Authors: Ziad Rania , Kawde Abdel-Nasser , AbdelHamid Ayman , Daoudi Kais 
Published: May 2024

Abstract
In this study, an L-cystine-modified glassy carbon electrode (GCE) was developed as an electrochemical platform based on AgNP oxidative stripping for nanomolar indirect detection of bovine serum albumin (BSA) biomacromolecules. The Poly-L-Cys was formed by L-cysteine (L-Cys) monomers electro-polymerization on the GCE surface. L-Cys pending groups interacted with AgNPs through Ag-S chemical bonds while it interacted with BSA through van der Waals forces and hydrogen bonding. To characterize the bare GCE and GCE/L-Cys, cyclic voltammetry and electrochemical impedance spectroscopy were used. The oxidative stripping of AgNPs by the addition of BSA was monitored using linear sweep stripping analysis.
Topological spin-torque in non-collinear anti-ferromagnetic 3Q state
Authors: Abbout Adel 
Published: May 2024

Abstract
We investigate the spin torque in the topological phase of the 3Q antiferromagnetic (AFM) configuration. We first obtain the band structure to identify the topology and nature of the different gaps of the system and then calculate the spin density in the whole system. We demonstrate the presence of a non-vanishing spin-torque component at the edge of the system and analyze its effect on the texture. Moreover, we show that the direction of the torque depends hugely on the way we cut the system to define the edge.
Co-Al layered double oxide activated carbon composite for eliminating lead ions from water
Authors: Abushawish Alaa , Chatla Anjaneyulu , Almanassra Ismail W , Shanableh Abdallah , Atieh Muataz Ali 
Published: May 2024

Abstract
In the current study, preparation of cobalt-aluminum layered double oxide doped activated carbon (Co-Al LDO/AC) was achieved by the co-precipitation technique and utilized for the remediation of lead (Pb2+) from water. Various methods were employed to examine the properties of the composite material, including BET, XRD, FTIR, SEM, and EDS analysis. The material characterization outcomes indicated that the LDO structure was successfully incorporated into the AC matrices with a surface area of 189.4 m2/g. The influence of adsorption parameters including Co-Al LDO/AC dosage, period of contact, initial Pb2+ loading, and initial solution pH were investigated. Moreover, the isotherm and kinetic models were investigated to provide a deeper understanding of the elimination mechanism of Pb2+ ions. The adsorption results illustrated that pH has a substantial influence on Pb2+ removal with a highest removal effectiveness at pH = 6 and a fast adsorption rate within 7 h. The kinetic data were well aligned with the pseudo-second-order model while the isotherm data obeyed the Sips model (R2>0.966). The highest adsorption uptake, estimated by the Sips model was 25.09 mg/g. Considering the modeling and characterization of the spent Co-Al LDO/AC, a chemical interaction process was involved in the elimination process and mainly controlled by ion exchange, electrostatic interactions, and surface complexation mechanisms. Accordingly, the Co-Al LDO/AC could have great potential as a promising hybrid for the purification of toxic Pb2+ ions from contaminated water streams.
New 2D penta-SiPN: A wide and indirect bandgap semiconductor
Authors: Qattan I. A. , Sharma Shambhu Bhandari , Santosh KC , Abedrabbo Sufian 
Published: May 2024

Abstract
In recent years, two-dimensional (2D) pentagonal ternary monolayers have attracted much attention and emerged as a new class of materials because of their new feature and extensive applicability. Using first-principles density functional theory (DFT) calculations, we predict a new 2D pentagonal-SiPN or p-SiPN monolayer material. The new monolayer has shown to be structurally, thermodynamically, and dynamically stable. Our findings imply that p-SiPN is a wide and indirect bandgap semiconductor, with a highly tunable bandgap with applied equ-biaxial strain. This makes p-SiPN a promising candidate for futuristic optoelectronics and nanomechanics device applications.
Fast and Facile Synthesis of Passivated Perovskite Single Crystals with Zn-Porphyrin Derivatives
Authors: Soopy Abdul Kareem K. , Parida Bhaskar , Najar Adel 
Published: May 2024

Abstract
Organic-inorganic trihalide, ABX3 perovskite are excellent candidates for advanced optoelectronic applications beyond photovoltaics. Perovskite single crystals offer several advantageous special features, such as a long diffusion length, low trapped carrier density, and outstanding environmental stability to use in optoelectronics. In this work, Zn has been incorporated into MAPbBr3 single crystals as Zn- Porphyrin to passivate the bulk crystals and enhance their optical and electrical properties. The inverse temperature crystallization phenomenon was used to crystallize MAPbBr3 rapidly in hot solutions. The structural and optical characterization confirms that the passivation enhanced the optoelectronic properties of the single crystals.
Parametric study of bio-char production from the co-pyrolysis of tire and coffee wastes via fixed bed reactor
Authors: Žabčić Martina , Hilal Lina , Rocha-Meneses Lisandra , Inayat Abrar , Ghenai Chaouki , Shanableh Abdallah 
Published: May 2024

Abstract
Co-pyrolysis has become an eye-catching process for obtaining fuel and biochar and is attracting attention from both the scientific and industrial communities. One of the reasons for this is the wide variety of raw materials for the process itself and the possibility of obtaining attractive and high-quality products. The influence of three distinctive parameters has been studied on the co-pyrolysis reaction. These variables were temperature, reaction time, and plastic ratio. The results were analysed using Response Surface Methodology (RSM), and it was found that the optimum conditions to produce biochar from the co-pyrolysis of coffee and tire wastes were 359.441 °C, 10 minutes of reaction duration, and a plastic ratio of 97.8528 wt.%.
Highly ordered TiO2 Nanotubes decorated with plasmonic silver nanoparticles (TiO2/Ag) for ultra-sensitive SERS detection of textile dye contaminant Rhodamine 6 G
Authors: Ramachandran Krithikadevi , Rebhi Ameni , Trabelsi Khaled , Hajjaji Anouar , Soucase Bernabé Mari , Bessais Brahim , Gaidi Mounir 
Published: May 2024

Abstract
We report a susceptible, ultrafast, molecular fingerprint-specific detection tool of analytes at an extreme trace concentration using surface-enhanced Raman spectroscopy (SERS). Highly ordered TiO2 Nanotubes (NT) modified with plasmonic Ag nanoparticles (Ag) are fabricated by wet chemical strategy. TiO2/Ag nanostructures could benefit the SERS mechanism arising from the effects of both the charge transfer process within TiO2/Ag/analyte and the enhancement in the electromagnetic field by the twining of plasmonic Ag nanoparticles with the construction of semiconductor/plasmonic bi-component system (TiO2/Ag). To achieve a better density of Ag NPs on TiO2 nanotubes, the photoinduction process irradiation time was varied from 10 min to 40 min. The prepared bicomponent SERS system was validated for its structural and morphological properties. SERS optimization studies were analyzed with the probe molecule Rhodamine 6 G (R6G) with an initial concentration of 10−6M. The highest SERS enhancement was notified with TiO2/Ag20 min for R6G sensing. The fabricated optical sensor reproducibility in signal detection was scrutinized with Raman mapping studies and statistically validated by low RSD values of 9.8%. Furthermore, their detectability was gauged with low concentration detection of R6G down to Pico-molar levels (10−12M). Synergistic effects of both CT and EM contributed to SERS enhancement to trace and detected pico-levels of R6G by the fabricated bicomponent semiconductor/ plasmonic heterostructure system (TiO2/Ag 20 min).
Efficient Cooling for Agricultural Greenhouses in Hot Climates: A Novel Water Light Filter Design
Authors: AlSadah Jihad Hassan 
Published: May 2024

Abstract
The use of agricultural greenhouses in hot climates requires transparent enclosures to enable cooling for optimal plant growth. However, the cooling process incurs high water and energy costs due to solar gain and heat trapping. To address this issue, a novel enclosure design featuring a layer of liquid or water solution between two commercial grade glass layers has been proposed. This water solution absorbs thermal radiation and can be circulated through an active heat dissipation system. Carefully selected dyes can also be added to enhance water filter performance, allowing sufficient photosynthetically active radiation (PAR) through to the plants while blocking more of the non-PAR radiation.
To evaluate the efficiency of the proposed filter, a shading filter was used as a benchmarking scheme. The tests were conducted using clear water, mineral oil, and water with four commercially available pigments. Results indicated a reduction in the thermal load ranging from 31-62%, while the reduction in the photosynthetically active portion of the solar spectrum ranged from 32-79%. The clear water filter performed the best, blocking 45% of the thermal load while allowing 69% of weighted PAR radiation. This allowed for an additional 14% of PAR radiation compared to an equivalent 45% transparent shading device.
This new liquid filter design is effective in reducing cooling costs for agricultural greenhouses in hot climates, while still allowing for optimal plant growth. The clear water filter was found to be the most effective in blocking non-PAR radiation while still allowing sufficient PAR for the plants. However, there is potential for future work to identify additives that could enhance the filter’s overall performance. Engineering and technoeconomic development should be pursued to implement this technology for practical use in the field.
Enhanced photocatalytic activities of LaCoO3 perovskite nanostructures for degrading cationic and anionic dyes
Authors: Irshad Muhammed , Columbus Soumya , Parambath Javad B. M. 
Published: May 2024

Abstract
Sustainable and cost-effective technologies are crucial for addressing environmental pollution issues. Perovskite photocatalysts have gained increased attention as a potential solution which could be accounted to their tuneable structural characteristics, flexible bandgap, and superior catalytic properties. In this study, we synthesized Lanthanum Cobaltite (LaCoO3) perovskite nanostructures via co-precipitation for photocatalytic purposes. Morphological analysis revealed LaCoO3 nanoparticles with an average size of ∼33 nm whose crystalline characteristics were investigated as a function of annealing temperatures. We found that the pure and crystalline LaCoO3 phase formed after the post-annealing process at 600°C. Photocatalytic studies showed that the degradation potential of LaCoO3 was significantly improved when hydrogen peroxide (H2O2) was added as co-catalyst system. We achieved degradation efficiencies of up to 91% and 85% for MB and methyl orange (MO), respectively. LaCoO3/H2O2 exhibited excellent photocatalytic potential for degrading both anionic and cationic organic dyes for environmental remediation applications.
A Study on Plasminogen-Ag Nanoparticles Interaction and its Application in Sensor Development
Authors: AbdelHamid A , Boukhatem H , Elgamouz A , Bajou K 
Published: May 2024

Abstract
The interaction between plasminogen and Ag nanoparticles is studied using different techniques and applied for plasminogen sensor development. Ag nanoparticles are synthesized using an algal extract and their absorbance, emission, and electrochemical oxidation signals are detected and monitored as a function of plasminogen concentration. The variation in the optical and electrochemical properties of Ag nanoparticles is correlated with the changes in the hydrodynamic size of the bioconjugate at different plasminogen concentrations. A steady decrease in the absorbance and electrochemical oxidation peak of Ag nanoparticles is observed, while a threshold plasminogen concentration results in increasing the emission of Ag nanoparticles followed by a steady decrease in signal. The decrease in the optical and electrochemical oxidation signal of Ag nanoparticles agrees with the plasminogen-induced Ag nanoparticle agglomeration shown by dynamic light scattering. Calibration curves are established based on the absorbance, emission, and voltammetric studies obtaining a limit of detection as low as 0.740 nM with a wide linear range of 0.942-18.2 nM, which is a very promising analytical system for plasminogen detection, facilitating its progress as a biomarker for different biomedical applications.
High granularity resistive Micromegas for tracking detectors in future experiments
Authors: Camerlingo M.T. , Alviggi M. , Biglietti M. , Della Pietra M. , Di Nardo R. , Iengo P. , Iodice M. , Petrucci F. , Sekhniaidze G. , Sessa M. 
Published: May 2024

Abstract
After exploring different solutions and testing several options, the high granularity resistive Micromegas technology is now mature enough to offer an efficient operation up to particle rates of 10 MHz/cm2, maintaining the gas amplification above 104, with a large margin before breakdown in order to ensure a stable and reliable operation.
The detector exploits small-size readout pads for occupancy reduction and a double Diamond-Like Carbon (DLC) resistive layer with a network of dot-connections to ground for a fast charge evacuation.
The double-layer allows preserving the minimum resistance to suppress the discharge intensity for stable operations.
The performance measured with particle beams at CERN have shown a spatial resolution below 100 μm for mm-wide readout pads and a few ns time resolution.
Now, the technology is being scaled to larger areas, with the construction of detectors with an active area of ∼20×20 cm2 (already achieved) and new ∼40×50 cm2 prototypes under construction.
An overview of the detector technology, including the latest results, is presented in terms of the gain and rate capability (measured in the laboratory) and efficiency, time and spatial resolution (measured at the CERN SPS). Possible applications in HEP experiments, as well as future developments, are also reported.