Results 101 to 110 of about 6,452 (264)
Advanced Science, EarlyView.Phase‐resolved experiments and atomistic simulations reveal asynchronous ordering behaviors in a eutectic high‐entropy alloy during isothermal annealing. Distinct defect transport mechanisms are identified in coexisting B2 and BCC phases, showing that vacancy and interstitial mediated diffusion governs phase‐dependent thermal stability.
Huiwen Yao +5 more
wiley +1 more source
FIVE DIMENSIONAL BOOSTS AND ELECTROMAGNETIC FIELD IN KALUZA-KLEIN THEORY
Odessa Astronomical Publications, 2016 A stationary, spherically symmetric, 5D Kaluza-Klein theory exhibits 5D boosts. After reduction of 5D vacuum Einstein action of a diagonal 5D metric, we obtained Einstein equations with energy-momentum tensor of a massless scalar field.
V. D. Gladush, Nadim Al-Shawaf
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Advanced Science, EarlyView.Defect‐configurational origins of the asymmetric apparent electrostrain are revealed in different piezoelectric ceramics via atomic‐scale visualization of defect configurations. Migration of oxygen vacancies leads to the electrobending effect in N2‐sintered BaTiO3, while defect dipoles in Ba0.99TiO2.99 generate true asymmetric electrostrain without ...
Jie Wang +7 more
wiley +1 more source
Advanced Science, EarlyView.We investigate the geometry‐governed optoelectronic anisotropy arising from dielectric confinement in quasi‐1D γ‐GaS nanoribbons with intrinsically isotropic atomic structures. Dielectric mismatch between the nanoribbon and its surroundings leads to a general polarization‐dependent photoresponse during near‐field scattering.
Jiawei Jing +16 more
wiley +1 more source
Internal symmetries in Kaluza-Klein models
Journal of High Energy PhysicsThe usual approach to Kaluza-Klein considers a spacetime of the form M 4 × K and identifies the isometry group of g K 0 $$ {g}_K^0 $$ , the internal vacuum metric, with the gauge group in four dimensions.
João Baptista
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Characterization of Bach and Cotton Tensors on a Class of Lorentzian Manifolds
MathematicsIn this work, we aim to investigate the characteristics of the Bach and Cotton tensors on Lorentzian manifolds, particularly those admitting a semi-symmetric metric ω-connection.
Yanlin Li +3 more
doaj +1 more source
Physics Letters B, 2014 We consider Kaluza–Klein (KK) models where internal spaces are compact Einstein spaces. These spaces are stabilized by background matter (e.g., monopole form-fields).
Alexey Chopovsky +2 more
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Einstein metrics on the ten-sphere
Journal of the European Mathematical SocietyWe prove the existence of three non-round, non-isometric Einstein metrics with positive scalar curvature on the sphere S^{10} . Previously, the only even-dimensional spheres known to admit non-round Einstein metrics were S^{6} and
Jan Nienhaus, Matthias Wink
openaire +3 more sources
Maskit combinations of Poincaré–Einstein metrics
Advances in Mathematics, 2006 26 pages (slight changes to bibliography)
Mazzeo, Rafe, Pacard, Frank
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Precisely Printing Perovskite Nanocrystals in Glass via Thermoelectric Synergistic Effect
Advanced Science, EarlyView.Based on the direct migration and enrichment of Cs ions in glass driven by thermoelectric fields, a novel method has been developed to achieve controllable crystallization and patterned distribution of CsPbBr3 PNCs in stable glass. The distribution scale of PNCs strongly depends on the thermoelectric processing conditions (temperature, electric field ...
Zhiheng Miao +6 more
wiley +1 more source