Results 141 to 150 of about 8,614,781 (356)

Structure and Migration Mechanisms of Oxygen Interstitial Defects in β‐Ga2O3

open access: yesphysica status solidi (b), EarlyView.
The structures and diffusion mechanisms of interstitial oxygen in different charge states in β‐Ga2O3 are extensively studied using density functional theory. The results provide a detailed map of the potential energy surface for oxygen interstitials in β‐Ga2O3 and demonstrate how these ions migrate between different rings in the structure.
Chaiyawat Kaewmeechai   +2 more
wiley   +1 more source

Mapping Thermal Conductivity at the Atomic Scale: A Step toward the Thermal Design of Materials

open access: yesphysica status solidi (b), EarlyView.
The site‐projected thermal conductivity method resolves the local thermal conduction contribution per atom by decomposing the Green–Kubo thermal conductivity tensor under the harmonic approximation. It highlights thermally active sites and “thermal defects” within disordered or amorphous materials, enabling spatially resolved insights into atomic‐scale
Chinonso Ugwumadu   +3 more
wiley   +1 more source

Magnetic Hopfions as Local Rotations of the Uniform Magnetization Background

open access: yesphysica status solidi (RRL) – Rapid Research Letters, EarlyView.
The Hopf mapping of 3D coordinate space to the unit sphere m2 = 1 in the magnetization space m(r) can be parametrized by some angles. These angles are used to define a local rotation matrix to restore the hopfion magnetization configuration from the uniformly magnetized state for any Hopf indices.
Konstantin Y. Guslienko
wiley   +1 more source

Entanglement in Quantum Systems Based on Directed Graphs

open access: yesAdvanced Quantum Technologies, EarlyView.
The entanglement properties of quantum states associated with directed graphs are investigated. It is proved that the vertex degree distribution fully determines this entanglement measure, which remains invariant under vertex relabeling, thereby highlighting its topological character.
Lucio De Simone, Roberto Franzosi
wiley   +1 more source

Global existence and blow-up of solutions for parabolic systems with nonlinear nonlocal boundary conditions

open access: yesElectronic Journal of Differential Equations, 2013
In this article we study a nonlinear parabolic system with nonlinear nonlocal boundary conditions. We prove the uniqueness of the solutions and establish the conditions for global solutions and non-global solutions.
Zhou Sen, Zuodong Yang
doaj  

Challenges in nonlocal modeling: nonlocal boundary conditions and nonlocal interfaces.

open access: yesProposed for presentation at the WCCM 2020 held January 11-15, 2021 in Virtual., 2020
openaire   +2 more sources

Polymer‐Assisted Direct and Rapid Microwave Synthesis of Mesoporous Binary and Ternary Metal Oxides for Electrocatalytic Water Oxidation

open access: yesSmall, EarlyView.
A novel direct and facile microwave synthesis route to prepare mesoporous binary and ternary metal oxides with P‐123® as porogen is presented. NiFe2O4 is applied in alkaline Oxygen Evolution Reaction (OER) and shows improved performance in comparison to nanoparticular and Evaporation Induced Self‐Assembly (EISA)‐derived mesoporous NiFe2O4.
Jasmin Helgert   +3 more
wiley   +1 more source

Home - About - Disclaimer - Privacy