Browsing Institutt for fysikk by Title

Now showing items 1283-1302 of 2655

    • Loss Measurements in Silicon Core Optical Waveguides 

      Eraker, Andreas Juvkam (Master thesis, 2013)
      Silicon core fibers have, because of their non-linear optical properties and transmission in the IR, recently been the focus of several different research groups. At NTNU, a new method for production of silicon fibers has ...

    • Low Energy Electronic Properties of Graphene and Molybdenum Disulfide 

      Blikø, Monika (Master thesis, 2013)
      We investigate the electronic structure of two-dimensional (2D)materials with and without spin-orbit coupling. Initially, we use thetight-binding model to derive the electronic structure of graphene with staggered sublattice ...

    • Low Rank States with Bound Entanglement in a System of three qubits 

      Irgens, Børge (Master thesis, 2013)
      We have studied mixed quantum states in the system of three qubits with the property that all their partial transposes are positive; these are called PPT states. We classify a PPT state by the ranks of the state itself and ...

    • Low-Energy Electronic Properties of Graphene 

      Vatanparast, Maryam (Master thesis, 2013)
      We investigate the electronic structure of two-dimensional (2D) mate- rials with and without spin-orbit coupling. Initially, we use the tight- binding model to derive the electronic structure of graphene with stag- gered ...

    • Low-energy properties of electrons and holes in CuFeS2 

      Brekke, Bjørnulf; Malyshev, Roman; Svenum, Ingeborg-Helene; Selbach, Sverre Magnus; Tybell, Per Thomas Martin; Brüne, Christoph; Brataas, Arne (Peer reviewed; Journal article, 2022)
      The antiferromagnetic semiconductor CuFeS2 belongs to a magnetic symmetry class that is of interest for spintronics applications. In addition, its crystal lattice is compatible with Si, making it possible to integrate it ...

    • Low-loss silicon core fibre platform for mid-infrared nonlinear photonics 

      Ren, Haonan; Shen, Li; Runge, Antoine; Hawkins, Thomas A.; Ballato, John; Gibson, Ursula; Peacock, Anna (Journal article; Peer reviewed, 2019)
      Broadband mid-infrared light sources are highly desired for wide-ranging applications that span free-space communications to spectroscopy. In recent years, silicon has attracted great interest as a platform for nonlinear ...

    • Low-Temperature Growth of Graphene on a Semiconductor 

      Røst, Håkon Ivarssønn; Chellappan, Rajesh Kumar; Strand, Frode Sneve; Grubišić-Čabo, Antonija; Reed, Benjamen P.; Prieto, Mauricio J.; Tǎnase, Liviu C.; Caldas, Lucas de Souza; Wongpinij, Thipusa; Euaruksakul, Chanan; Schmidt, Thomas; Tadich, Anton; Cowie, Bruce; Li, Zheshen; Cooil, Simon; Wells, Justin (Peer reviewed; Journal article, 2021)
      The industrial realization of graphene has so far been limited by challenges related to the quality, reproducibility, and high process temperatures required to manufacture graphene on suitable substrates. We demonstrate ...

    • Luminescent Eu3+-doped NaLa(WO4)(MoO4) and Ba2CaMoO6 prepared by the modified Pechini method 

      Sletnes, Malin; Skjærvø, Susanne Linn; Lindgren, Mikael; Grande, Tor; Einarsrud, Mari-Ann (Journal article; Peer reviewed, 2016)
      Modified Pechini synthesis routes were developed for synthesis of the novel red phosphor materials NaLa(WO4)(MoO4):Eu3+ and Ba2CaMoO6:Eu3+. Phase pure NaLa(WO4)(MoO4):Eu3+ was obtained at calcination temperatures ≥600 °C ...

    • Machine-learned model Hamiltonian and strength of spin–orbit interaction in strained Mg2X (X = Si, Ge, Sn, Pb) 

      Alidoust, Mohammad; Rothmund, Erling Velten; Akola, Jaakko (Peer reviewed; Journal article, 2022)
      Machine-learned multi-orbital tight-binding (MMTB) Hamiltonian models have been developed to describe the electronic characteristics of intermetallic compounds Mg2Si, Mg2Ge, Mg2Sn, and Mg2Pb subject to strain. The MMTB ...

    • Macromolecular interactions at the single-molecule level - Fluctuation analysis of bound states 

      Bruvold, Are Sæle (Master thesis, 2018)
      The recognition, binding and release of macromolecules are precisely orchestrated in a stochastic interplay governing all enzymatic, immunological and cellular processes. Deciphering this complex synergy in order to ...

    • Magnetic and Thermodynamic Properties of Layered and Thin Film Superconductors 

      Thisted, Ulrik Schou (Doktoravhandlinger ved NTNU, 1503-8181; 2004:63, Doctoral thesis, 2004)
      A large variety of measurements, most of magnetic nature, performed on single crystals of high temperature superconductors and thin films of lead, are presented. Furthermore, numerical calculations of the magnetic properties ...

    • Magnetic domain configuration of (111)-oriented LaFeO3 epitaxial thin films 

      Hallsteinsen, Ingrid; Moreau, Magnus; Chopdekar, R.V.; Christiansen, Emil; Nord, Magnus Kristofer; Vullum, Per Erik; Grepstad, Jostein; Holmestad, Randi; Selbach, Sverre Magnus; Scholl, A; Arenholz, E; Folven, Erik; Tybell, Per Thomas Martin (Journal article; Peer reviewed, 2017)
      In antiferromagnetic spintronics control of the domains and corresponding spin axis orientation is crucial for devices. Here we investigate the antiferromagnetic axis in (111)-oriented LaFeO3/SrTiO3, which is coupled to ...

    • Magnetic flux density measurements and mobile phone provocation studies: Investigations in the 50 Hz and the mobile phone frequency regions 

      Straume, Aksel (Doktoravhandlinger ved NTNU, 1503-8181; 2007:114, Doctoral thesis, 2007)
      The aims of this thesis work were divided into two main areas. The first area was an investigation of the extremely low frequency magnetic fields in urban environment and from electrical devices. The second area was mobile ...

    • Magnetic Resonance Imaging (MRI) Quality Assurance Phantom and Protocol 

      Gyebi, Alex Gyamfi (Master thesis, 2023)
      Mål: Foreslå og designe en billig, lett produsert, og svært effektiv alternativ kvalitetskontroll fantom og medfølgende måleprotokoll for MRI kvalitetskontroll. Materiale og Metoder: Allment tilgjengelige og billige ...

    • Magnetic Resonance Imaging: Multidimensional non-Gaussian Diffusion-weighted MRI - Image quality analysis 

      Meisingset, Jens Wergeland (Master thesis, 2015)
      To investigate the viability of two different nuclear magnetic resonance imaging systems for acquisition of highly diffusion weighted, multidimensional human brain data, images were acquired on both, using two different ...

    • Magnetization Dissipation in Bulk Ferromagnets and Ferromagnetic Quantum Dots 

      Fjærbu, Eirik Løhaugen (Master thesis, 2014)
      We study the magnetization dynamics of a nano-scale ferromagnet. We show that the phenomenological Landau-Lifschitz-Gilbert predicts a damped precession of the magnetization. The ferromagnet is coupled to two large reservoirs ...

    • Magnetization dynamics and Majorana fermions in ferromagnetic Josephson junctions along the quantum spin Hall edge 

      Black-Schaffer, Annica; Linder, Jacob (Journal article; Peer reviewed, 2011)
      We investigate the interplay between ferromagnetic and superconducting order at the edge of a quantum spin Hall insulator. Using complementary analytical and self-consistent numerical approaches, we study a ferromagnetic ...

    • Magnetization Dynamics and Spinsupercurrents in Superconductingand Multiferroic Systems 

      Kulagina, Iryna (Doctoral thesis at NTNU;2016:5, Doctoral thesis, 2016)
      This thesis presents the research findings from three articles which have been published or submitted for publication. In the first article, we study the magnetization dynamics and anomalous supercurrent that can arise ...

    • Magnetization dynamics in ferromagnetic, antiferromagnetic and superconducting systems 

      Simensen, Haakon Thømt (Doctoral theses at NTNU;2021:197, Doctoral thesis, 2021)
      The electron spin is an intrinsic property of the electron, just as its charge. Its spin is binary of nature, and is therefore well suited for encoding 0’s and 1’s in computers. The technology aiming to utilize the electron ...

    • Magnetization dynamics in nanostructures 

      Flovik, Vegard (Doctoral theses at NTNU;2016:360, Doctoral thesis, 2016)
      Summary of thesis: Understanding the properties of magnetic structures when confined to nanoscale dimensions is of both fundamental interest, as well as of importance for the development of modern electronics technology. ...