Institutt for fysikk
Nye registreringer
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Fully resolved strain field of the β’’ precipitate calculated by density functional theory
(Peer reviewed; Journal article, 2020)The β′′ precipitate is the main hardening phase in age hardenable Al-Mg-Si alloys, and it is therefore of major scientific and industrial importance. A full model of the β′′ precipitate cross-section embedded in an aluminium ... -
Strong Coupling and Nonextensive Thermodynamics
(Peer reviewed; Journal article, 2020)We propose a Hamiltonian-based approach to the nonextensive thermodynamics of small systems, where 'small' is a relative term comparing the size of the system to the size of the effective interaction region around it. We ... -
Detailed investigation of the shearing mechanism of β" precipitates in Al-Mg-Si alloys
(Peer reviewed; Journal article, 2020)The mechanism behind shearing of β'' precipitates in Al-Mg-Si alloys during deformation is investigated by applying advanced transmission electron microscopy (TEM) techniques and frozen phonon multislice TEM image simulations ... -
Modelling of two-phase equilibrium, stability and steady-state flow in porous media
(Doctoral theses at NTNU;2020:364, Doctoral thesis, 2020)This thesis concerns fundamental aspects of coexistence and flow of two fluid phases within porous media. Specifically, the focus is on thermodynamic stability and equilibrium on the scale of a single pore and on macroscopic ... -
Flow-Area Relations in Immiscible Two-Phase Flow in Porous Media
(Journal article; Peer reviewed, 2020)We present a theoretical framework for immiscible incompressible two-phase flow in homogeneous porous media that connects the distribution of local fluid velocities to the average seepage velocities. By dividing the pore ... -
Four-wave Mixing-based Wavelength Conversion and Parametric Amplification in Submicron Silicon Core Fibers
(Peer reviewed; Journal article, 2020)Silicon core fibers represent a versatile platform for all-fiber integrated nonlinear optical applications. This paper describes the state of the art in four-wave mixing-based parametric amplification, and wavelength ... -
Broadband infrared and THz transmitting silicon core optical fiber
(Peer reviewed; Journal article, 2020)Silicon waveguide structures are a viable alternative for the transmission of signals over a wide range of frequencies, and new fabrication methods are key to increased applications. In this work, THz transparency of ... -
Donnan Contribution and Specific Ion Effects in Swelling of Cationic Hydrogels are Additive: Combined High-Resolution Experiments and Finite Element Modeling
(Journal article; Peer reviewed, 2020)Finite element modeling applied to analyze experimentally determined hydrogel swelling data provides quantitative description of the hydrogel in the aqueous solutions with well-defined ionic content and environmental ... -
Electronic and adsorption properties of extended chevron and cove-edged graphene nanoribbons
(Peer reviewed; Journal article, 2021)The electronic and adsorption properties of chevron and cove-edged graphene nanoribbons (GNRs) are studied using first principles calculations. The positive binding and adsorption energies in conjunction with the positive ... -
First-principles study of tensile and shear strength of Fe-Al and α-AlFeSi intermetallic compound interfaces
(Peer reviewed; Journal article, 2021)First-principles virtual tensile and shear strength calculations have been performed on the Fe2Al5// Fe4Al13 and -AlFeSi// Fe4Al13 interfaces. The Fast Inertial Relaxation Engine (FIRE) algorithm is used for optimizing ... -
Atomistic simulations of early stage clusters in Al-Mg alloys
(Peer reviewed; Journal article, 2019)The Cluster Expansion formalism based on Density Functional Theory (DFT) simulation data has been applied for AlMg alloys with high accuracy ( meV/atom). The atomistic simulations are used to model the AlMg phase diagram, ... -
Grain boundary structures and their correlation with intergranular corrosion in an extruded Al-Mg-Si-Cu alloy
(Peer reviewed; Journal article, 2020)A detailed analysis of grain boundaries in a highly textured Al-Mg-Si-Cu alloy is presented in this work. Electron backscatter diffraction demonstrates the presence of three main categories of grain boundaries in addition ... -
Exchange-only, nuclear spin-free qubits in semiconductor quantum dots
(Doctoral theses at NTNU;2020:255, Doctoral thesis, 2020)There are many successful proposals for using electron spins in quantum dots as qubits. However, a semiconductor quantum dot-based qubit that is scalable, reliable and robust enough for actual quantum information applications ... -
Magneto-dynamic properties of thin films and interfaces
(Doctoral theses at NTNU;2020:278, Doctoral thesis, 2020)Magnonics is a developing branch in the field of condensed matter physics with the potential to fulfill the future demand for miniaturized, fast, and energy-efficient spintronics devices. This thesis explores both a novel ... -
Possible odd-frequency Amperean magnon-mediated superconductivity in topological insulator–ferromagnetic insulator bilayer
(Journal article; Peer reviewed, 2020)We study the magnon-mediated pairing between fermions on the surface of a topological insulator (TI) coupled to a ferromagnetic insulator with a tilted mean field magnetization. Tilting the magnetization toward the interfacial ... -
First principle calculations of pressure dependent yielding in solute strengthened aluminium alloys
(Journal article; Peer reviewed, 2020)The pressure dependence of the yield stress in solute strengthened aluminium alloys is investigated by first principle calculations. The solute elements studied are magnesium, silicon and copper. A fixed boundary cluster ... -
Electroconductive scaffolds for tissue engineering applications
(Journal article, 2020)Many material systems that can conduct electronic current have been in recent years studied in the context of tissue engineering. It is suggested that materials that can carry electronic current are necessary or beneficial ... -
On the formation mechanism of Ba0.85Ca0.15Zr0.1Ti0.15O3 thin films by aqueous chemical solution deposition
(Journal article; Peer reviewed, 2020)Here we report on the development of an environmentally friendly, simple and robust aqueous chemical solution route for the fabrication of Ba0.85Ca0.15Zr0.1Ti0.9O3 (BCZT) thin films. Using a stable aqueous precursor solution, ... -
Proximity effects in superconducting hybrid structures with spin-dependent interactions
(Doctoral theses at NTNU;2020:243, Doctoral thesis, 2020)When superconductors are contacted by other, non-superconducting materials, the latter may attain some of the properties of the former, and vice versa. This is the origin of a wealth of interesting phenomena. A striking ... -
The Effect of Elevated Temperatures on Precipitation in Aluminium Alloys – An Advanced Transmission Electron Microscopy Study
(Doctoral theses at NTNU, 2020:229, Doctoral thesis, 2020)Aluminium (Al) alloys are increasingly found and sought-after in applications that involve exposure to elevated temperatures. Examples are automotive components located in the engine room, heat exchangers, and subsea/offshore ...
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