Recent Submissions

  • Structure and Optical Properties of Titania-PDMS Hybrid Nanocomposites Prepared by In Situ Non-Aqueous Synthesis 

    Dalod, Antoine Robert Marie; Grendal, Ola Gjønnes; Blichfeld, Anders Bank; Furtula, Vedran; Pérez, Javier; Henriksen, Lars; Grande, Tor; Einarsrud, Mari-Ann (Journal article; Peer reviewed, 2017)
    Organic-inorganic hybrid materials are attractive due to the combination of properties from the two distinct types of materials. In this work, transparent titania-polydimethylsiloxane hybrid materials with up to 15.5 vol. ...
  • p-wave triggered superconductivity in single layer graphene on an electron-doped oxide superconductor 

    Di Bernardo, Angelo; Millo, Oded; Barbone, Matteo; Alpern, Hen; Kalcheim, Yoam; Sassi, Ugo; Ott, Anna; De Fazio, Domenico; Yoon, Duhee; Amado, Mario; Ferrari, Andrea; Linder, Jacob; Robinson, Jason W.A. (Journal article; Peer reviewed, 2017)
    Electron pairing in the vast majority of superconductors follows the Bardeen–Cooper–Schrieffer theory of superconductivity, which describes the condensation of electrons into pairs with antiparallel spins in a singlet state ...
  • Tunability of Andreev levels via spin-orbit coupling in Zeeman-split Josephson junctions 

    Hashimoto, Tatsuko; Golubov, Alexander; Tanaka, Yukio; Linder, Jacob (Journal article; Peer reviewed, 2017)
    We study Andreev reflection and Andreev levels ε in Zeeman-split superconductor/Rashba wire/Zeeman split superconductor junctions by solving the Bogoliubov–de Gennes equation. We theoretically demonstrate that the Andreev ...
  • Cytotoxicity of poly(Alkyl cyanoacrylate) nanoparticles 

    Sulheim, Einar; Iversen, Tore Geir; To, Vu; Klinkenberg, Geir; Sletta, Håvard; Schmid, Ruth; Hatletveit, Anne Rein; Wågbø, Ane Marit; Sundan, Anders; Skotland, Tore; Sandvig, Kirsten; Mørch, Ýrr Asbjørg (Journal article; Peer reviewed, 2017)
    Although nanotoxicology has become a large research field, assessment of cytotoxicity is often reduced to analysis of one cell line only. Cytotoxicity of nanoparticles is complex and should, preferentially, be evaluated ...
  • Effects of Germanium, Copper, and Silver Substitutions on Hardness and Microstructure in Lean Al-Mg-Si Alloys 

    Mørtsell, Eva Anne; Marioara, Calin Daniel; Andersen, Sigmund Jarle; Røyset, Jostein; Reiso, Oddvin; Holmestad, Randi (Journal article, 2015)
    It is shown that strength loss in a 6060 Al-Mg-Si alloy caused by reduction in solute can be compensated by adding back smaller quantities of Ag, Ge, and Cu. Nine alloys were investigated. Ge was found to be the most ...
  • Atomic-resolution chemical mapping of ordered precipitates in Al alloys using energy-dispersive X-ray spectroscopy 

    Wenner, Sigurd; Jones, Lewys; Marioara, Calin Daniel; Holmestad, Randi (Journal article, 2017)
    Scanning transmission electron microscopy (STEM) coupled with energy-dispersive X-ray spectroscopy (EDS) is a common technique for chemical mapping in thin samples. Obtaining high-resolution elemental maps in the STEM is ...
  • Thermal stability of the lightweight 2099 Al-Cu-Li alloy: Tensile tests and microstructural investigations after overaging 

    Balducci, E; Ceschini, L; Messieri, S; Wenner, Sigurd; Holmestad, Randi (Journal article, 2017)
    The thermal stability of the lightweight, T83 heat treated 2099 Al-Cu-Li alloy was assessed in the temperature range 200–305 °C, through both hardness and tensile tests after overaging. After prolonged thermal exposure, ...
  • Ultrasound Improves the Delivery and Therapeutic Effect of Nanoparticle-Stabilized Microbubbles in Breast Cancer Xenografts 

    Snipstad, Sofie; Berg, Sigrid; Mørch, Ýrr Asbjørg; Bjørkøy, Astrid; Sulheim, Einar; Hansen, Rune; Grimstad, Ingeborg; van Wamel, Annemieke; Maaland, Astri Fjelde; Torp, Sverre Helge; Davies, Ruth Catharina de Lange (Journal article; Peer reviewed, 2017)
    Compared with conventional chemotherapy, encapsulation of drugs in nanoparticles can improve efficacy and reduce toxicity. However, delivery of nanoparticles is often insufficient and heterogeneous because of various ...
  • A review of materials engineering in silicon-based optical fibre 

    Healy, Noel; Gibson, Ursula; Peacock, Anna (Journal article; Peer reviewed, 2017)
    Semiconductor optical fibre technologies have grown rapidly in the last decade and there are now a range of production and post-processing techniques that allow for a vast degree of control over the core material's ...
  • Spin pumping, dissipation, and direct and alternating inverse spin Hall effects in magnetic-insulator/normal-metal bilayers 

    Kapelrud, Andre; Brataas, Arne (Journal article; Peer reviewed, 2017)
    We theoretically consider the spin-wave mode- and wavelength-dependent enhancement of the Gilbert damping in magnetic insulator–normal metal bilayers due to spin pumping as well as the enhancement's relation to direct and ...
  • Spin Superfluidity in Biaxial Antiferromagnetic Insulators 

    Qaiumzadeh, Alireza; Skarsvåg, Hans Langva; Holmqvist, Cecilia; Brataas, Arne (Journal article; Peer reviewed, 2017)
    Antiferromagnets may exhibit spin superfluidity since the dipole interaction is weak. We seek to establish that this phenomenon occurs in insulators such as NiO, which is a good spin conductor according to previous studies. ...
  • Terahertz Antiferromagnetic Spin Hall Nano-Oscillator 

    Cheng, Ran; Xiao, Di; Brataas, Arne (Journal article; Peer reviewed, 2016)
    We consider the current-induced dynamics of insulating antiferromagnets in a spin Hall geometry. Sufficiently large in-plane currents perpendicular to the Néel order trigger spontaneous oscillations at frequencies between ...
  • Backscattering in helical edge states from a magnetic impurity and Rashba disorder 

    Kimme, Lukas; Rosenow, Bernd; Brataas, Arne (Journal article; Peer reviewed, 2016)
    Transport by helical edge states of a quantum spin Hall insulator is experimentally characterized by a weakly temperature-dependent mean free path of a few microns and by reproducible conductance oscillations, challenging ...
  • Electrically driven Bose-Einstein condensation of magnons in antiferromagnets 

    Fjærbu, Eirik Løhaugen; Rohling, Niklas; Brataas, Arne (Journal article; Peer reviewed, 2017)
    We explore routes to realize electrically driven Bose-Einstein condensation of magnons in insulating antiferromagnets. Even in insulating antiferromagnets, the localized spins can strongly couple to itinerant spins in ...
  • Enhanced Spin Conductance of a Thin-Film Insulating Antiferromagnet 

    Bender, Scott A.; Skarsvåg, Hans Langva; Brataas, Arne; Duine, R A (Journal article; Peer reviewed, 2017)
    We investigate spin transport by thermally excited spin waves in an antiferromagnetic insulator. Starting from a stochastic Landau-Lifshitz-Gilbert phenomenology, we obtain the out-of-equilibrium spin-wave properties. In ...
  • Equations of motion and frequency dependence of magnon-induced domain wall motion 

    Risinggård, Vetle Kjær; Tveten, Erlend Grytli; Brataas, Arne; Linder, Jacob (Journal article; Peer reviewed, 2017)
    Spin waves can induce domain wall motion in ferromagnets. We derive the equations of motion for a transverse domain wall driven by spin waves. Our calculations show that the magnonic spin-transfer torque does not cause ...
  • Spin pumping and inverse spin Hall voltages from dynamical antiferromagnets 

    Johansen, Øyvind; Brataas, Arne (Journal article; Peer reviewed, 2017)
    Dynamical antiferromagnets can pump spins into adjacent conductors. The high antiferromagnetic resonance frequencies represent a challenge for experimental detection, but magnetic fields can reduce these resonance frequencies. ...
  • Spin Hall effect and spin swapping in diffusive superconductors 

    Espedal, Camilla; Lange, Peter; Sadjina, Severin Simon; Mal'Shukov, Anatoly Germanovich; Brataas, Arne (Journal article; Peer reviewed, 2017)
    We consider the spin-orbit-induced spin Hall effect and spin swapping in diffusive superconductors. By employing the nonequilibrium Keldysh Green's function technique in the quasiclassical approximation, we derive coupled ...
  • Phenomenology of current-induced skyrmion motion in antiferromagnets 

    Velkov, H; Gomonay, O; Beens, M; Schwiete, G; Brataas, Arne; Sinova, J; Duine, R A (Journal article; Peer reviewed, 2016)
    We study current-driven skyrmion motion in uniaxial thin film antiferromagnets in the presence of the Dzyaloshinskii–Moriya interactions and in an external magnetic field. We phenomenologically include relaxation and ...
  • The Effects of Low Cu Additions and Predeformation on the Precipitation in a 6060 Al-Mg-Si Alloy 

    Saito, Takeshi; Muraishi, Shinji; Marioara, Calin Daniel; Andersen, Sigmund Jarle; Jostein, Røyset; Holmestad, Randi (Journal article, 2013)
    Effects of low Cu additions (≤0.10 wt pct) and 10 pct predeformation before aging on precipitates’ microstructures and types in a 6060 Al-Mg-Si alloy have been investigated using transmission electron microscopy (TEM). It ...

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