Blar i Institutt for fysikk på tittel
Viser treff 147-166 av 2652
-
Análise da Reflexão 001 da Níquel-Fluorohectorita por Difração de Raios X Síncrotron
(Journal article; Peer reviewed, 2016)In the present work X-ray diffraction was used in order to observe the stable hydration states of the clay nickel-fluorohectorite. The diffraction patterns were measured as function of relative humidity and temperature. ... -
Andreev bound states in Josephson junctions: unconventional pairing symmetries in weak magnetic field and strong-field formalism
(Master thesis, 2017)The supercurrent in the normal region of a superconductor - normal metal - superconductor structure (SNS), when exposed to an external magnetic field, is studied. The current is found via the energy levels of the Andreev ... -
Andreev reflection in altermagnets
(Journal article; Peer reviewed, 2023)Recent works have predicted materials featuring bands with a large spin-splitting distinct from ferromagnetic and relativistically spin-orbit-coupled systems. Materials displaying this property are known as altermagnets ... -
Angle Resolved Relaxation of Spin Currents by Antiferromagnets in Spin Valves
(Peer reviewed; Journal article, 2019)We observe and analyze tunable relaxation of a pure spin current by an antiferromagnet in spin valves. This is achieved by carefully controlling the angle between a resonantly excited ferromagnetic layer pumping the spin ... -
Anisotropic and controllable Gilbert-Bloch dissipation in spin valves
(Peer reviewed; Journal article, 2019)Spin valves form a key building block in a wide range of spintronic concepts and devices from magnetoresistive read heads to spin-transfer-torque oscillators. We elucidate the dependence of the magnetic damping in the free ... -
Anisotropic depth migration of converted wave data, inversion of multicomponent data to estimate elastic parameters at the seafloor and one-dimensional data-driven inversion
(Doktoravhandlinger ved NTNU, 1503-8181; 2008:210, Doctoral thesis, 2006)The increasing demand for oil and gas in the world today drives the need for new and improved methods for identifying hydrocarbon prospects. The petroleum industry uses information about the subsurface in the exploration ... -
Anisotropic diffusion and the cosmic ray anisotropy
(Journal article; Peer reviewed, 2019)We argue that the diffusion of cosmic rays in the Galactic magnetic field has to be strongly anisotropic. As a result, the number of CR sources contributing to the local CR flux is strongly reduced. The CR density is ... -
Anisotropic long-range spin transport in canted antiferromagnetic orthoferrite YFeO3
(Peer reviewed; Journal article, 2022)In antiferromagnets, the efficient transport of spin-waves has until now only been observed in the insulating antiferromagnet hematite, where circularly (or a superposition of pairs of linearly) polarized spin-waves diffuse ... -
Anisotropic long-range spin transport in canted antiferromagnetic orthoferrite YFeO3
(Peer reviewed; Journal article, 2022)In antiferromagnets, the efficient transport of spin-waves has until now only been observed in the insulating antiferromagnet hematite, where circularly (or a superposition of pairs of linearly) polarized spin-waves diffuse ... -
Anisotropic Paramagnetic Meissner Effect by Spin-Orbit Coupling
(Journal article, 2016)Conventional s-wave superconductors repel an external magnetic field. However, a recent experiment [A. Di Bernardo et al., Phys. Rev. X 5, 041021 (2015)] has tailored the electromagnetic response of superconducting ... -
Anisotropic plasmonic Cu nanoparticles in sol-gel oxide nanopillars studied by spectroscopic Mueller matrix ellipsometry
(Journal article; Peer reviewed, 2013)Broadened plasmon resonances of Cu nanoparticles in nanopatterned mixed oxide sol-gel nanopillars are shown to be readily detected by spectroscopic Mueller matrix ellipsometry. The plasmonic nanomaterials are obtained by ... -
Anisotropies and magnetic phase transitions in insulating antiferromagnets determined by a Spin-Hall magnetoresistance probe
(Journal article; Peer reviewed, 2019)Antiferromagnets possess a number of intriguing and promising properties for electronic devices, which include a vanishing net magnetic moment and thus insensitivity to large magnetic fields and characteristic terahertz ... -
Anomalous diffusion in systems with concentration-dependent diffusivity: exact solutions and particle simulations
(Journal article; Peer reviewed, 2020)We explore the anomalous diffusion that may arise as a result of a concentration dependent diffusivity. The diffusivity is taken to be a power law in the concentration, and from exact analytical solutions we show that the ... -
Anomalous domain wall velocity and Walker breakdown in hybrid systems with anisotropic exchange
(Journal article; Peer reviewed, 2013)It has recently been proposed that spin-transfer torques in magnetic systems with anisotropic exchange can be strongly enhanced, reducing the characteristic current density with up to four orders of magnitude compared to ... -
Anomalous Paths in Quantum Mechanical Path-Integrals
(Journal article; Peer reviewed, 2013)We investigate modifications of the discrete-time lattice action, for a quantum mechanical particle in one spatial dimension, that vanish in the naïve continuum limit but which, nevertheless, induce nontrivial effects due ... -
Anomalous Thermoelectric Effect in Tilted Dirac and Weyl Semimetals
(Master thesis, 2022)Effektive Dirac likninger i topologisk faststoff-fysikk kan, i motsetning til høy-energi ekvivalentene, ha ledd som ikke er Lorentz invariante. Flere slike systemer har blitt oppdaget, både teoretisk og eksperimentelt, ... -
Antideuterons as Signature for Dark Matter
(Master thesis, 2011)In this thesis, we examine the antideuteron spectra from annihilations of dark matter in the form of Weakly Interacting Massive Particles (WIMPs). The so-called coalescence model is commonly used to describe the production ... -
Antiferromagnetic Insulator Spintronics
(Doctoral theses at NTNU;2019:343, Doctoral thesis, 2019)Summary: Spin currents can make your computer energy efficient and ultrafast Have you noticed that your laptop sometimes can get quite warm? Electronical devices rely on transfer of information via a charge current ... -
Antiferromagnetic magnons as highly squeezed Fock states underlying quantum correlations
(Peer reviewed; Journal article, 2019)Employing the concept of two-mode squeezed states from quantum optics, we demonstrate a revealing physical picture for the antiferromagnetic ground state and excitations. Superimposed on a Néel ordered configuration, a ... -
Antiferromagnetic Neuromorphic Computing
(Master thesis, 2022)Nevromorf prosessering er et felt innen datavitenskap som har som mål å designe prosseseringsenheter med inspirasjon fra hjernedynamikk. Når en lager slike prosessorer med tradisjonell halvleder teknologi møter en store ...