Physics Access

Physics Access Physics Access publishes high-quality research in all areas of physics and builds on the strength and prestige of the Journal of Physics series.

Physics Access is an international open-access journal advancing discovery in physics and interdisciplinary science, technology, and engineering through rigorous peer-reviewed research. The journal does not make a subjective assessment on the potential future significance of a paper, instead providing a rapid platform for communicating research that meets high standards of scientific rigor and con

tributes to the development of knowledge in physics. All physics-related research is in scope, including interdisciplinary and multidisciplinary studies. All types of results can be published, provided they contribute to advancing knowledge in their field, including negative results, null results and replication studies.

30/07/2026

📢 New Research Article Published in Physics Access

We are pleased to announce a new Research Article in Physics Access (Volume 6, Issue 2).

🔬 Title:
Halide-Induced Band Gap Modulation in RbPbCl₃₋ₓBrₓ Perovskites: Insights from a First-Principles Study

👤 Author:
Magaji Ismail

This study employs density functional theory (DFT) to investigate how bromine substitution influences the structural and electronic properties of inorganic halide perovskites RbPbCl₃₋ₓBrₓ. The calculations reveal that halide substitution significantly affects lattice parameters, bond lengths, unit cell volume, and mechanical stiffness.

Electronic structure analysis shows that all investigated compositions retain a direct band gap while the band gap decreases systematically from 2.22 eV to 1.21 eV as bromine concentration increases. Density of states analysis further explains the electronic contributions responsible for this tunable behaviour, highlighting the effectiveness of halide engineering.

These findings are relevant for the design and optimization of halide perovskite materials for optoelectronic and photovoltaic applications.

📄 Read the full article:
https://doi.org/10.47514/phyaccess.2026.6.2.011

Congratulations to the author on this important contribution to computational materials science, halide perovskites, and photovoltaic materials research.

Physics Access
Advancing discovery in physics and interdisciplinary science, technology, and engineering.

30/07/2026

📢 New Research Article Published in Physics Access

We are pleased to announce a new Research Article in Physics Access (Volume 6, Issue 2).

🔬 Title:
Formation Energy and Phonon Dispersion of Halogen-Doped Rutile TiO₂: First-Principles Investigation

👤 Author(s):
Timothy Bulus, Alhassan Shuaibu, Sadiq A. Garba, and Philibus M. Gyuk

This study employs density functional theory (DFT) and density functional perturbation theory (DFPT) to investigate the formation energy and phonon dispersion of halogen-doped rutile TiO₂. By substituting oxygen atoms with fluorine, chlorine, bromine, and iodine, the authors evaluated the effects of halogen doping on thermodynamic stability and lattice dynamics.

The results demonstrate that halogen incorporation is energetically favourable, with fluorine-doped TiO₂ exhibiting the greatest stability. Phonon dispersion calculations confirmed the dynamical stability of all doped systems, while systematic changes in vibrational properties highlighted the influence of dopant mass and bonding characteristics.

These findings are relevant for the design of advanced TiO₂-based materials for photocatalysis, optoelectronics, and energy conversion technologies.

📄 Read the full article:
https://doi.org/10.47514/phyaccess.2026.6.2.010

Congratulations to the authors on this important contribution to computational materials science, photocatalysis, and optoelectronic materials research.

Physics Access
Advancing discovery in physics and interdisciplinary science, technology, and engineering.

22/07/2026

📢 New Research Article Published in Physics Access

We are pleased to announce a new Research Article in Physics Access (Volume 6, Issue 2).

🔬 Title:
First-Principles Investigation of Structural, Electronic, Mechanical, Optical, and Thermodynamic Properties of Lead-Free KSrX₃ (X = F, Cl, and Br) Halide Perovskites for UV Optoelectronic Applications

👤 Author(s):
Rose P. Abang, Auwalu Musa, Reuben A. Solomon, Abdulkadir S. Gidado, and Sylvester Hassan

This study employed density functional theory (DFT) within Quantum ESPRESSO to provide a comprehensive investigation of lead-free KSrF₃, KSrCl₃, and KSrBr₃ halide perovskites.

The results demonstrate that all three compounds are structurally, thermodynamically, mechanically, and dynamically stable. KSrF₃ exhibited a direct band gap of 5.52 eV, while KSrCl₃ and KSrBr₃ showed indirect band gaps of 4.45 and 3.75 eV, respectively. Optical calculations further revealed strong UV absorption and favourable dielectric properties, with KSrF₃ emerging as the most promising candidate for deep-UV applications.

These findings are relevant for the development of stable, lead-free halide perovskite materials for UV and deep-UV optoelectronic devices.

📄 Read the full article:
https://doi.org/10.47514/phyaccess.2026.6.2.009

Congratulations to the authors on this important contribution to computational materials science, halide perovskites, and optoelectronic materials research.

Physics Access
Advancing discovery in physics and interdisciplinary science, technology, and engineering.

21/07/2026

📢 New Research Article Published in Physics Access

We are pleased to announce a new Research Article in Physics Access (Volume 6, Issue 2).

🔬 Title:
An Offline-First Low-Cost Smart Home Automation System Using Bluetooth and Android-Based Voice Control for Resource-Constrained Environments

👤 Author(s):
Muhammad I. Abdulganiyu, Isaac H. Daniel, Alhassan Shuaibu, and Nicodemus Kure

This study presents the design, implementation, and performance evaluation of an offline-first, low-cost smart home automation system developed for environments where internet connectivity may be limited or unreliable.

The system integrates a NodeMCU ESP8266 microcontroller, HC-05 Bluetooth module, multi-channel relay interface, and Android-based voice control to enable localized appliance control without internet dependency. A dual-mode interaction framework allows users to control appliances manually through a graphical user interface or through voice commands.

Performance evaluation showed average response times of 0.3 s for manual control and 0.8 s for voice control. Stable communication was achieved over a 10 m line-of-sight range, while packet delivery success rates reached 98.0% under line-of-sight conditions and 94.5% in obstructed indoor environments.

These findings are relevant for the development of affordable, reliable, and infrastructure-independent smart home automation systems for resource-constrained environments.

📄 Read the full article:
https://doi.org/10.47514/phyaccess.2026.6.2.008

Congratulations to the authors on this important contribution to smart home automation, embedded systems, Internet of Things technologies, and intelligent control systems.

Physics Access
Advancing discovery in physics and interdisciplinary science, technology, and engineering.

21/07/2026

📢 New Research Article Published in Physics Access

We are pleased to announce a new Research Article in Physics Access (Volume 6, Issue 2).

🔬 Title:
Development and Validation of a Measurement-Informed MATLAB/Simulink Harmonic Propagation Model for a Practical 33 kV Distribution Network

👤 Author(s):
Bamaiyi C. Daniel, Isaac H. Daniel, Mohammed M. Aliyu, Abdulkarim L. Meyere, and Nicodemus Kure

This study presents the development and validation of a measurement-informed MATLAB/Simulink model for analysing harmonic propagation in a practical 33 kV distribution network, using the Ungwan Boro feeder in Kaduna Metropolis, Nigeria, as the study network.

The model incorporates field-derived feeder characteristics, transformer impedance, load current profiles, frequency-dependent network impedances, nonlinear loads, and harmonic current injections. Simulation results revealed pronounced current distortion dominated by the 3rd, 5th, and 7th harmonics.

At the Ardo Substation, the simulated current THD of 27.69% closely reproduced the measured value of 27.95%, corresponding to a deviation of only 0.94%. The strong agreement between simulated and field-derived results demonstrates the model's ability to reproduce the principal harmonic characteristics of the investigated distribution feeder.

These findings are relevant for harmonic propagation analysis, power quality assessment, and the development of effective harmonic mitigation strategies in electrical distribution networks.

📄 Read the full article:
https://doi.org/10.47514/phyaccess.2026.6.2.007

Congratulations to the authors on this important contribution to power systems, power quality, electrical distribution networks, and computational modelling.

Physics Access
Advancing discovery in physics and interdisciplinary science, technology, and engineering.

21/07/2026

📢 New Research Article Published in Physics Access

We are pleased to announce a new Research Article in Physics Access (Volume 6, Issue 2).

🔬 Title:
Screening-Level Radiological Risk Assessment of Natural Radionuclides in Jabi Lake Sediments Using RESRAD-Onsite: A Conservative Scenario-Based Assessment

👤 Author(s):
John K. Simon, Sonnie J. Oniye, Abrahim G. Yisa, Andrew O. Agbon, and Abdulsamad Asuku

This study presents a screening-level radiological risk assessment of naturally occurring radionuclides in sediments from Jabi Lake, Abuja, Nigeria. Activity concentrations of ²²⁶Ra, ²³²Th, and ⁴⁰K were evaluated alongside conservative exposure scenarios using the RESRAD-Onsite computer code.

The measured radionuclide concentrations and corresponding radium equivalent activity were below recommended UNSCEAR limits, indicating that the present radiological status of the lake sediments is unlikely to pose significant health concerns. Under hypothetical long-term exposure scenarios, conservative modelling identified fish consumption as the dominant potential exposure pathway.

The study provides important baseline radiological data for Jabi Lake and demonstrates the value of integrating environmental measurements with conservative modelling for preliminary risk evaluation and future monitoring.

These findings are relevant for environmental radiation monitoring, screening-level radiological risk assessment, and the protection of aquatic environments and surrounding communities.

📄 Read the full article:
https://doi.org/10.47514/phyaccess.2026.6.2.006

Congratulations to the authors on this important contribution to environmental radioactivity, radiological risk assessment, and environmental protection research.

Physics Access
Advancing discovery in physics and interdisciplinary science, technology, and engineering.

21/07/2026

📢 New Research Article Published in Physics Access

We are pleased to announce a new Research Article in Physics Access (Volume 6, Issue 2).

🔬 Title:
Risk Assessment and Uncertainty Analysis of Radon-222 Concentrations in Groundwater Within Abuja, Nigeria, Using Liquid Scintillation Counting

👤 Author(s):
Blessing C. Nwankwo and Yakubu V. Ibrahim

This study assesses Radon-222 (²²²Rn) concentrations, associated radiological risks, and measurement uncertainties in groundwater within Kubwa, Abuja, Nigeria. Thirty groundwater samples collected during the peak dry season were analysed using a calibrated Tri-Carb 1000 TR liquid scintillation analyser.

The measured ²²²Rn concentrations ranged from below the detection limit to 2.30 Bq L⁻¹, with a mean of 0.29 ± 0.43 Bq L⁻¹. Estimated annual effective doses were of the order of 10⁻³ mSv y⁻¹, well below the recommended reference level of 0.1 mSv y⁻¹, indicating very low radiological risk from ingestion of the investigated groundwater.

The study also highlights the importance of accounting for detection limits and measurement uncertainty when evaluating low-level environmental radioactivity.

These findings are relevant for groundwater radiation safety, environmental radioactivity monitoring, and improving the reliability of radiological risk assessments through measurement uncertainty analysis.

📄 Read the full article:
https://doi.org/10.47514/phyaccess.2026.6.2.005

Congratulations to the authors on this important contribution to environmental radioactivity, radiation protection, and health physics research.

Physics Access
Advancing discovery in physics and interdisciplinary science, technology, and engineering.

13/07/2026

📢 New Research Article Published in Physics Access

We are pleased to announce a new Research Article in Physics Access (Volume 6, Issue 1).

🔬 Title:
First-Principles Investigation of Alkaline-Earth Metal Co-Doped Hexagonal WO₃ for Enhanced Near-Infrared Optical Response

👤 Author(s):
Umar Ibrahim, Alhassan Shuaibu, Adamu Muhammed, Yakubu T. Aliyu, Musa Lawal, and Timothy Bulus

This study investigates the structural, thermodynamic, electronic, and optoelectronic properties of alkaline-earth metal co-doped hexagonal WO₃ using Density Functional Theory (DFT). The results demonstrate that Be–Ba co-doping significantly narrows the band gap, enhances near-infrared optical absorption, and preserves visible-light transparency.

The thermodynamically stable (Be, Ba) co-doped system exhibited excellent optical characteristics, highlighting its potential for next-generation smart windows, photothermal devices, and energy-efficient optical technologies.

These findings are relevant for the development of advanced functional materials for optoelectronics, energy-efficient glazing, and infrared-responsive technologies.

📄 Read the full article:
https://doi.org/10.47514/phyaccess.2026.6.1.004

Congratulations to the authors on this important contribution to computational materials science, condensed matter physics, and optoelectronic materials research.

Physics Access
Advancing discovery in physics and interdisciplinary science, technology, and engineering.

13/07/2026

📢 New Research Article Published in Physics Access

We are pleased to announce a new Research Article in Physics Access (Volume 6, Issue 2).

🔬 Title:
Crystallographic and Spectroscopic Analysis of Activated Carbon Derived from Microwave-Assisted KOH Activation of Banana Peels

👤 Author(s):
Mary E. Oni, John C. Agomuo, Samuel M. Udeh, and Salisu I. Kunya

This study investigates how microwave-assisted KOH activation influences the crystallographic structure and surface chemistry of activated carbon produced from banana peel waste. Using X-ray diffraction (XRD) and Raman spectroscopy, the authors demonstrated progressive improvements in crystallinity and graphitization with increasing activation time.

The optimized 30–40 minute activation period produced activated carbon with enhanced graphitic ordering, indicating improved electrical conductivity and charge-storage capability for advanced material applications.

These findings are relevant for the sustainable development of high-performance carbon materials for energy storage, adsorption technologies, and environmental remediation.

📄 Read the full article:
https://doi.org/10.47514/phyaccess.2026.6.2.003

Congratulations to the authors on this important contribution to materials science, carbon nanomaterials, and sustainable engineering.

Physics Access
Advancing discovery in physics and interdisciplinary science, technology, and engineering.

13/07/2026

📢 New Research Article Published in Physics Access

We are pleased to announce a new Research Article in Physics Access (Volume 6, Issue 2).

🔬 Title:
Factors Influencing Households' Intention to Adopt Solar Photovoltaic Technology for Net Metering in Mzuzu City, Malawi

👤 Author(s):
Lottie Singini, Chikumbusko Kaonga, and Christabel Kambala

This study examines the factors influencing urban households' intention to adopt solar photovoltaic (PV) technology under Malawi's newly introduced net-metering framework. Guided by the Theory of Planned Behaviour (TPB) and the Technology Acceptance Model (TAM), the research identified house ownership, perceived economic and environmental benefits, household size, electricity expenditure, gender, and education level as significant predictors of adoption intention.

The study also highlights landlord–tenant constraints and regulatory uncertainty as important barriers to household participation, providing valuable evidence for policy development and the successful implementation of net metering.

These findings are relevant for promoting renewable energy adoption, strengthening energy policy, and supporting the transition to sustainable electricity systems.

📄 Read the full article:
https://doi.org/10.47514/phyaccess.2026.6.2.002

Congratulations to the authors on this important contribution to renewable energy, energy policy, and sustainable development research.

Physics Access
Advancing discovery in physics and interdisciplinary science, technology, and engineering.

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