🔬 physics

Performance Optimization of Lead-Free Double Perovskite Solar Cells Employing CsPbI₃ and Cs₂TiBr₆ Absorbers a Numerical Study

This numerical study utilizing SCAPS-1D simulation demonstrates that optimizing device architecture, bandgap engineering, and transport layers can significantly enhance the power conversion efficiency of lead-free CsPbI₃ and Cs₂TiBr₆ perovskite solar cells, with the Cs₂TiBr₆-based configuration achieving a peak efficiency of 22.29%.

Md Shawon2026-06-25
🔬 physics

Two-Stage Neural Residual Decoding for FastSurface-Code Quantum Error Correction

This paper proposes a two-stage neural residual decoding framework that combines a pretrained graph neural network for local confidence-based pre-decoding with a global NVIDIA-accelerated minimum-weight perfect matching cleanup, achieving significant improvements in both logical failure rates and decoding speed across various code distances and noise models compared to traditional methods.

Jiajun Chen, Jierui Peng, Jingyi Liu2026-06-25
🔬 physics

First-Principles Investigation of Metallization and Electron-Phonon-Mediated Superconductivity in Compressed Alkali Bromides and Iodides

This first-principles study investigates the pressure-induced metallization and electron-phonon-mediated superconductivity in compressed alkali bromides and iodides, revealing that the superconducting transition temperature is primarily governed by electron-phonon coupling strength and is more closely linked to the ground-state crystal structure than to high-pressure phases.

Y. Ramola, Orchid Id2026-06-25
🔬 physics

A large positive motional anharmonicity in the electron-on-helium qubit: consequences for gates, readout, and the coherence frontier

This study predicts that electrons on superfluid helium exhibit a large, positive motional anharmonicity that enables high-fidelity gates and strong-dispersive readout, thereby identifying coherence times (T17 μT_1 \gtrsim 7~\mus and T24 μT_2 \gtrsim 4~\mus) as the primary remaining barrier to realizing a viable qubit platform.

Hikaru Wakaura, Taiki Tanimae2026-06-25
🔬 physics

Coincidence of the metal-insulator transition and epsilon near zero condition in amorphous FeCuB films

This study demonstrates that in sputter-grown amorphous FeCuB films, the epsilon near zero (ENZ) condition coincides with the disorder-driven metal-insulator transition on the metallic side, as the dielectric function approaches zero at metal concentrations similar to those near the transition point.

Vera N. Smolyaninova, Lukas Hamann, Tyler Hannesson, Shiva Pokhrel, John Fields, Dariush Aligholizadeh, Mary Sajini Deva (…)2026-06-25
🔬 physics

A First-Principles Analysis of Monolayer and Bilayer 2D SnTe Phases (α, β, γ, hexa and π): Layer-Dependent Structural, Electrical, Optical, Thermodynamic and Vibrational Properties

This study employs first-principles DFT calculations to comprehensively characterize the structural, electronic, optical, thermodynamic, and vibrational properties of various monolayer and bilayer SnTe phases, identifying the γ-bilayer and π-monolayer as dynamically stable candidates with promising potential for spintronic, optoelectronic, and thermoelectric applications.

Md. Saiful Islam, Hasibul Hassan Rizvee, Budrun Neher, Farid Ahmed2026-06-25
🔬 physics

Physics-Informed Machine Learning for Structural Stability and Bandgap Engineering in Lead-Free Sn–Ge Perovskites for Photovoltaic Applications

This study employs a Physics-Informed Machine Learning framework to systematically screen approximately 1,000 lead-free Sn–Ge perovskite compositions, successfully identifying a robust stability window that balances structural integrity with optimal bandgap properties for next-generation, non-toxic photovoltaic applications.

Rashmi Singh2026-06-25