Results 21 to 30 of about 9,953 (225)

Dark Matter With Stückelberg Axions

Frontiers in Physics, 2019
Here, we review a class of models which generalize the traditional Peccei-Quinn (PQ) axion solution by a Stückelberg pseudoscalar. Such axion models represent a significant variant with respect to earlier scenarios, where axion fields were associated ...
Claudio Corianò, Paul H. Frampton, Nikos Irges, Alessandro Tatullo   +3 more
doaj   +1 more source

Broadband, Flexible, Skin‐Compatible Carbon Dots/Graphene Photodetectors for Wearable Applications

Advanced Functional Materials, EarlyView.
Broadband, flexible photodetectors integrating nitrogen‐rich carbon dots with single‐layer graphene on plastic substrates are demonstrated. A biocompatible chitosan–glycerol electrolyte enables efficient low‐voltage gating and on‐skin operation. The devices exhibit ultraviolet‐to‐near‐infrared response, mechanical robustness under bending, and verified
Nouha Loudhaief, Petr Rozhin, Ilaria Bertuol, Ali Raza, Leonardo Viti, Subhankar Roy, Enrico Cavarzerani, Luca Sbuelz, Matteo Brilli, Andrea Serinolli, Jacopo Nicoletti, Riccardo Piccoli, Sebastián Castilla, Simone Dal Zilio, Enrique Rodríguez‐Castellón, Miriam Serena Vitiello, Maurizio Selva, Flavio Rizzolio, Alvise Perosa, Giovanni Antonio Salvatore, Domenico De Fazio   +20 more
wiley   +1 more source

Design and Fabrication of High Dielectric GRIN Lens for a Directive Antenna Using a Hybrid Filled Voxel Additive Manufacturing Technique

Advanced Materials Technologies, EarlyView.
Hybrid‐filled voxel AM enables integration of high‐permittivity materials into additively manufactured devices. Using this approach, a graded refractive index (GRIN) lens is demonstrated, achieving a 50% antenna size reduction with enhanced directivity.
Qianfang Zheng, Anna Radkovskaya, Kailun Xu, Ekaterina Shamonina, Patrick S. Grant   +4 more
wiley   +1 more source

Global anomalies & bordism of non-supersymmetric strings

Journal of High Energy Physics
The three tachyon-free non-supersymmetric string theories in ten dimensions provide a handle on quantum gravity away from the supersymmetric lamppost.
Ivano Basile, Arun Debray, Matilda Delgado, Miguel Montero   +3 more
doaj   +1 more source

Recyclable and Binder‐Free EGaIn–Carbon Liquid Metal Composite: A Sustainable Approach for High‐Performance Stretchable Electronics, Thermal‐Interfacing and EMI‐Shielding

Advanced Materials Technologies, EarlyView.
Binder‐free EGaIn–CB composite deliver printable, recyclable liquid‐metal conductors without sintering or polymer binders. Only 1.5 wt% CB yields shear‐thinning, high‐viscosity rheology, ∼60% bulk EGaIn conductivity, robust stretchability, high thermal conductivity, and strong EMI shielding (35 → 70 dB at 100% strain).
Elahe Parvini, Abdollah Hajalilou, Pedro A. Lopes, Tiago A. Morgado, Mahmoud Tavakoli   +4 more
wiley   +1 more source

Electroluminescence and Franz–Keldysh Modulation Observed in Sn/Ge Multi‐Quantum Wells

Advanced Optical Materials, EarlyView.
We investigate the optoelectronic properties of PIN diodes based on ultrathin α‐Sn/Ge multiple quantum film structures, fabricated by molecular beam epitaxy, both experimentally and theoretically. The samples exhibit a light emission spectrum in the short‐wavelength infrared range with two transitions. Furthermore, when operating as a photodetector, we
Michael Oehme, Damiano Marian, Maurice Wanitzek, Christian Spieth, Daniel Schwarz, Florian Bärwolf, Markus Andreas Schubert, Alwin Daus, Michele Virgilio, Giovanni Capellini   +9 more
wiley   +1 more source

Decoding Trap States in Working 2D Perovskite Multi‐Functional Devices

Advanced Science, EarlyView.
Illustration of the photoluminescence spectrum and energy‐level landscape governing trap‐mediated carrier dynamics in 2D F‐PEAI photodetectors. A novel approach capturing dynamic trap occupation and retrapping in devices under operating conditions, directly links defect energetics to carrier transport and enhanced photoresponse in multifunctional ...
Ioannis Leontis, Karl Jonas Riisnaes, Hoi Tung Lam, Rosanna Mastria, Luisa De Marco, Annalisa Coriolano, Steven Hepplestone, Monica Felicia Craciun, Saverio Russo   +8 more
wiley   +1 more source

Photochemical Control of Perovskite Crystal Formation at Room Temperature

Advanced Science, EarlyView.
The authors demonstrate how ultraviolet (UV) light can enable the crystallization of two‐dimensional (2D) perovskite crystals that are otherwise difficult to grow using conventional thermal methods. These findings are supplemented with a detailed mechanistic description for the interaction of the UV irradiation with the perovskite precursor components.
Magdalena Breitwieser, Lukas E. Lehner, Julius Feigl, Lukas M. Rescher, Julia Felicitas Schwarz, Felix Mayr, Munise Cobet, Bekele Hailegnaw, Christoph Putz, Clemens Schwarzinger, Markus Clark Scharber, Markus Himmelsbach, Bert Nickel, Stepan Demchyshyn, Martin Kaltenbrunner   +14 more
wiley   +1 more source

Central extensions of higher groups: Green-Schwarz mechanism and 2-connections [PDF]

, 2023
Monica Jinwoo Kang, Sungkyung Kang
openalex   +1 more source

Analyzing individual rent price ratios in eastern German agricultural land markets: A GAMLSS approach

Agribusiness, EarlyView.
Abstract This study explores the rent price ratio in agricultural land markets, crucial for evaluating market efficiency, policy needs, and farmer decision‐making. Traditionally, the analyses faced challenges due to the absence of concurrent sale and rent data for the same land, potentially leading to biased results.
Marius Michels, Cord‐Friedrich von Hobe, Miryam Sarah Merk, Thomas Kneib, Oliver Musshoff   +4 more
wiley   +1 more source