Results 121 to 130 of about 1,232 (254)

Solar Eruptions Triggered by Flux Emergence below or near a Coronal Flux Rope

The Astrophysical Journal
Observations have shown a clear association of filament/prominence eruptions with the emergence of magnetic flux in or near filament channels. Magnetohydrodynamic (MHD) simulations have been employed to systematically study the conditions under which ...
T. Török, M. G. Linton, J. E. Leake, Z. Mikić, R. Lionello, V. S. Titov, C. Downs   +6 more
doaj   +1 more source

Machine Learning‐Assisted Design and Performance Prediction of a Compact Dual‐Band Polarization‐Insensitive THz Metamaterial Absorber for Skin‐Cancer‐Related Refractive‐Index Sensing

Advanced Electronic Materials, EarlyView.
A compact QASRR‐based THz metamaterial absorber enables polarization‐insensitive dual‐band absorption and skin‐cancer‐related refractive‐index sensing through measurable resonance shifts. Field, surface‐current, and circuit analyses clarify the dual‐resonance mechanism, while StackNet‐assisted prediction accurately estimates the simulated absorption ...
Md. Murad Kabir Nipun, S. M. Rifatur Rana, Md. Golam Morshed, Imrose Jahan, F. A. Sabbir Ahamed, Md. Jahedul Islam   +5 more
wiley   +1 more source

Magnetic Connectivity in the Time-dependent Corona and Heliosphere

The Astrophysical Journal Letters
Magnetic flux fills the heliosphere, expands outward from the solar corona, and is fundamentally related to the structure and dynamics of the solar corona and solar wind.
Roberto Lionello, Cooper Downs, Emily I. Mason, Jon A. Linker, Pete Riley, Mathew J. Owens   +5 more
doaj   +1 more source

Controllable Ge Hut Wires With Mobilities Exceeding 20 000 cm2 V−1 s−1

Advanced Electronic Materials, EarlyView.
The controlled growth of germanium hut wires on patterned SiGe/Si(001) substrates is reported. These self‐assembled nanowires achieve a record hole mobility of 22 900 cm2 V−1 s−1 at 4.2 K. Remarkably, conductance quantization is observed at a channel length of 1.9 µm, highlighting their exceptionally low disorder and paving the way for scalable, high ...
Ming Ming, Jian‐Huan Wang, Jie‐Yin Zhang, Ding‐Ming Huang, Dan Han, Ting Wang, Jing Teng, Jian‐Jun Zhang   +7 more
wiley   +1 more source

Environmental Effects on RRAM Cells Based on 2D Halide Perovskite Materials

Advanced Electronic Materials, EarlyView.
RRAM offers high speed, scalability, and low power, positioning it as a next‐generation non‐volatile memory. Two‐dimensional halide perovskites show promise due to tunable optoelectronic properties and flexible processing but suffer from environmental sensitivity. This review examines degradation from humidity, temperature, light, and strain, discusses
Mojtaba Joodaki, Babitha Arun, Hartmut Hillmer, Chih‐Chieh Hsu   +3 more
wiley   +1 more source

Observations of Microwave Emission from Solar Jets and Comparison with Magnetohydrodynamic Simulations

The Astrophysical Journal
We computed the thermal microwave emission from a 3D magnetohydrodynamic (MHD) simulation and compared it with observations of solar jets. The simulation treats the emergence of magnetic flux into the solar atmosphere and its interaction with a low ...
Costas E. Alissandrakis, Vasilis Archontis, Kostas Moraitis   +2 more
doaj   +1 more source

Wavelength and Pulsewidth Tunable Flexible CsPbBr3 Perovskite Microlasers by Mechanical Stress Modulation

Advanced Electronic Materials, EarlyView.
Mechanically tunable all‐organic CsPbBr3 perovskite microlasers on a flexible PET substrate is demonstrated, enabling simultaneous wavelength and pulsewidth modulation of laser emission. The strain–photon synergetic coupling mechanism is revealed.
Zhaohuan Cai, Zhan Su, Fuyi Cao, Xiaobo Hu, Guoen Weng, Hidefumi Akiyama, Shaoqiang Chen   +6 more
wiley   +1 more source

The Giant Eruption in Solar Cycle 25 Caused by Collisional Shearing

The Astrophysical Journal Letters
On 2024 October 3, solar active region (AR) 13842 produced an X9.0 flare, which is the largest one in Solar Cycle 25 so far. Our study is to answer the question of what process caused this flare.
Tao Ding, Jun Zhang, Yijun Hou
doaj   +1 more source

Effects of Doping, Disorder, and Compensation on Electron Conduction in Si‐Doped k‐Ga2O3 Close to the Metal‐to‐Insulator Transition

Advanced Electronic Materials, EarlyView.
Self‐compensation effects attributed to doping‐dependent shift‐defects at APBs Validation of Hall data for VRH transport near the MIT Persistence of VRH transport for any SiH4 flow in Si‐doped κ‐Ga2O3 due to high compensation coupling transport and EPR data as strategy to study electronic properties and doping T‐dependence of transport data agrees with
Antonella Parisini, Hans Jürgen von Bardeleben, Ildicò Cora, Zsolt Fogarassy, Paola Alippi, Vincenzo Fiorentini, Ian Vickridge, Piero Mazzolini, Alessio Bosio, Roberto Fornari   +9 more
wiley   +1 more source

Global Impact of Emerging Internetwork Fields on the Low Solar Atmosphere

The Astrophysical Journal
Small-scale, newly emerging internetwork (IN) magnetic fields are considered a viable source of energy and mass for the solar chromosphere and possibly the corona. Multiple studies show that single events of flux emergence can indeed locally heat the low
M. Gošić, B. De Pontieu, A. Sainz Dalda   +2 more
doaj   +1 more source