The flourishing of topological photonics in the last decade was achieved mainly due to developments in linear topological photonic ***,when nonlinearity is introduced,many intriguing questions *** example,are there un...
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The flourishing of topological photonics in the last decade was achieved mainly due to developments in linear topological photonic ***,when nonlinearity is introduced,many intriguing questions *** example,are there universal fingerprints of the underlying topology when modes are coupled by nonlinearity,and what can happen to topological invariants during nonlinear propagation?To explore these questions,we experimentally demonstrate nonlinearity-induced coupling of light into topologically protected edge states using a photonic platform and develop a general theoretical framework for interpreting the mode-coupling dynamics in nonlinear topological *** on laser-written photonic Su-Schrieffer-Heeger lattices,our experiments show the nonlinear coupling of light into a nontrivial edge or interface defect channel that is otherwise not permissible due to topological *** theory explains all the observations ***,we introduce the concepts of inherited and emergent nonlinear topological phenomena as well as a protocol capable of revealing the interplay of nonlinearity and *** concepts are applicable to other nonlinear topological systems,both in higher dimensions and beyond our photonic platform.
Schizophrenia (SZ) is a prevalent mental disorder characterized by cognitive, emotional, and behavioral changes. Symptoms of SZ include hallucinations, illusions, delusions, lack of motivation, and difficulties in con...
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Magnesium-rare earth (Mg-RE) alloys offer exceptional specific strength, presenting significant opportunities for lightweight structural applications, yet require deep understanding for process optimization. This stud...
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Magnesium-rare earth (Mg-RE) alloys offer exceptional specific strength, presenting significant opportunities for lightweight structural applications, yet require deep understanding for process optimization. This study systematically investigates how varying Yttrium (Y) content (x = 1.5, 2.5, 3.5 wt%) interacts with thermomechanical processing (hot-extrusion followed by 200°C aging) to govern microstructural evolution and mechanical properties (at room temperature (RT) and 250°C) in Mg-11Gd-xY-0.5Zr alloys. Comprehensive characterization using scanning electron microscope (SEM), electron backscatter diffraction (EBSD), X-ray diffraction (XRD), and transmission electron microscope (TEM) revealed complex microstructural responses: increasing Y promoted grain refinement but yielded non-monotonic dynamic recrystallization (DRX) behaviour during extrusion and induced significant detrimental coarsening of the β phase morphology at higher concentrations (3.5 wt%). Aging precipitated the crucial nano-scale β′ strengthening phase, while further dynamic precipitation of β′ was observed during high-temperature (HT) deformation. Effective precipitation strengthening in the AGY1.5 alloy (1.5 wt% Y) yielded optimal RT properties, including an ultimate tensile strength (UTS) exceeding 500 MPa. Conversely, 3.5 wt% Y led to inferior strength despite finer grains and higher indicated dislocation density, unequivocally demonstrating the adverse impact of coarse β precipitates. Enhanced ductility and extended work hardening characterized the 250°C behavior across compositions, linked to dynamic precipitation effects and thermally activated non-basal slip systems. Crucially, this work demonstrates that precipitate characteristics—specifically morphology and spatial distribution—act as the dominant factor controlling mechanical performance variations with Y content in this system, overriding contributions from grain size, texture, and dislocation density. These findings provid
When searching for radiological sources in an urban area, a vehicle-borne detector system will often measure complex, varying backgrounds primarily from natural gamma-ray sources. Much work has been focused on develop...
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engineering new quantum phases often requires fine tuning of the electronic, orbital, spin, and lattice degrees of freedom. To this end, kagomé lattice with flat bands has garnered great attention by hosting vari...
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Boron nitride (BN) is an exceptional material and among its polymorphs, two-dimensional (2D) hexagonal and three-dimensional (3D) cubic BN (h-BN and c-BN) phases are most common. The phase stability regimes of these B...
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A summary of precision measurements sensitive to electroweak, QCD and quark-flavour effects performed by the ATLAS Collaboration at the Large Hadron Collider is reported. The measurements are predominantly performed o...
Cherenkov Telescope Array (CTA) will be the next generation gamma-ray observatory. It will consist of three different sizes of telescopes, with a collective improvement of about an order of magnitude in sensitivity, c...
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Recently, high-entropy alloys(HEAs) or multi-principal-element alloys with unprecedented physical,chemical, and mechanical properties, have been considered as candidate materials used in advanced reactors due to their...
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Recently, high-entropy alloys(HEAs) or multi-principal-element alloys with unprecedented physical,chemical, and mechanical properties, have been considered as candidate materials used in advanced reactors due to their promising irradiation resistant behavior. Here, we report a new single-phase bodycentered cubic(BCC) structured Ti_2 ZrHfV_(0.5)Mo_(0.2) HEA possessing excellent irradiation resistance, i.e.,scarcely irradiation hardening and abnormal lattice constant reduction after helium-ion irradiation,which is completely different from conventional alloys. This is the first time to report the abnormal XRD phenomenon of metallic alloys and almost no hardening after irradiation. These excellent properties make it to be a potential candidate material used as core components in next-generation nuclear reactors. The particular irradiation tolerance derives from high density lattice vacancies/defects.
The recent discovery of a new ferroelectric nematic (NF) liquid crystalline phase became of utmost interest for the liquid crystal (LC) and the whole soft and condensed matter fields. Contrary to the previously known ...
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