Results 11 to 20 of about 649,167 (252)

Vector-chirality driven topological phase transitions in noncollinear antiferromagnets and its impact on anomalous Hall effect

open access: yesCommunications Physics, 2023
Magnetic materials showing topologically nontrivial quantum states with high tunability is an undoubtedly important topic in condensed matter physics and material science.
Subhadip Pradhan   +3 more
doaj   +1 more source

Semiconjugate Factorizations of Higher Order Linear Difference Equations in Rings [PDF]

open access: yes, 2013
We study linear difference equations with variable coefficients in a ring using a new nonlinear method. In a ring with identity, if the homogeneous part of the linear equation has a solution in the unit group of the ring (i.e., a unitary solution) then ...
Sedaghat, H.
core   +1 more source

A Multiband Antenna Stacked with Novel Metamaterial SCSRR and CSSRR for WiMAX/WLAN Applications

open access: yesMicromachines, 2021
This paper presents an innovative method for the design of a triple band meta-mode antenna. This unique design of antenna finds application in a particular frequency band of WLAN and WiMAX.
Rajiv Mohan David   +3 more
doaj   +1 more source

Broadband graphene-based metamaterial absorbers

open access: yesAIP Advances, 2018
In this paper, a new type of broadband tunable metamaterial absorber is proposed. The structure consists of a single-layer ring graphene and a metal ground plane separated by a dielectric spacer.
Chang Liu, Limei Qi, Xu Zhang
doaj   +1 more source

Crystal structure, Hirshfeld surface analysis and density functional theory study of benzyl 2-oxo-1-(prop-2-yn-1-yl)-1,2-dihydroquinoline-4-carboxylate

open access: yesActa Crystallographica Section E: Crystallographic Communications, 2021
The title molecule, C20H15NO3, adopts a Z-shaped conformation with the carboxyl group nearly coplanar with the dihydroquinoline unit. In the crystal, corrugated layers are formed by C—H...O hydrogen bonds and are stacked by C—H...π(ring) interactions ...
Younos Bouzian   +5 more
doaj   +1 more source

On the identity of the last known stable radical in X-irradiated sucrose [PDF]

open access: yes, 2017
Identification of radiation-induced radicals in relatively simple molecules is a prerequisite for the understanding of reaction pathways of the radiation chemistry of complex systems.
Callens, Freddy   +4 more
core   +1 more source

8-(Pyridin-2-yl)quinolin-7-ol as a Platform for Conjugated Proton Cranes: A DFT Structural Design

open access: yesMicromachines, 2020
Theoretical design of conjugated proton cranes, based on 7-hydroxyquinoline as a tautomeric sub-unit, has been attempted by using ground and excited state density functional theory (DFT) calculations in various environments.
Anton Georgiev, Liudmil Antonov
doaj   +1 more source

Refractive Index Sensor Based on Fano Resonances in Metal-Insulator-Metal Waveguides Coupled with Resonators

open access: yesSensors, 2017
A surface plasmon polariton refractive index sensor based on Fano resonances in metal–insulator–metal (MIM) waveguides coupled with rectangular and ring resonators is proposed and numerically investigated using a finite element method.
Yue Tang   +6 more
doaj   +1 more source

The relations among invariants of points on the projective line [PDF]

open access: yes, 2009
We consider the ring of invariants of n points on the projective line. The space (P^1)^n // PGL_2 is perhaps the first nontrivial example of a Geometry Invariant Theory quotient. The construction depends on the weighting of the n points. Kempe discovered
Howard, Ben   +3 more
core   +4 more sources

Analysis and Design of a Metamaterial Lens Antenna Using the Theory of Characteristic Modes

open access: yesInternational Journal of Antennas and Propagation, 2018
A new single-layer metamaterial lens antenna aimed to operate at 10 GHz is proposed in this paper. The lens antenna consists of twelve capacitively coupled unit cells distributed along a ring and illuminated by an open-ended circular waveguide with a ...
Daniel Santillán-Haro   +3 more
doaj   +1 more source

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