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    • Observasjon i kvantefysikk: Ein studie av elevforståingar 

      Huseby, Anders (Master thesis, 2018)
      Denne oppgåva er gjort i samband med forskings- og utviklingsprosjektet ReleKvant, som tek for seg elevar si forståing av moderne fysikk, og utviklar nettbaserte læringsressursar innan temaet som er tilpassa kompetansemål ...

    • Observation in quantum physics: challenges for upper secondary physics students in discussing electrons as waves 

      Huseby, Anders; Bungum, Berit (Journal article; Peer reviewed, 2019)
      Quantum physics is challenging for young students, but also a source of fascination. Observation is a key concept in order to understand how principles and experimental results in quantum physics differ from what we are ...

    • Observation of a mesospheric front in a thermal-doppler duct over King George Island, Antarctica 

      Bageston, JV; Wrasse, CM; Batista, PP; Hibbins, Robert; Fritts, DC; Gobbi, D; Andrioli, VF (Journal article; Peer reviewed, 2011)
      A mesospheric front was observed with an all-sky airglow imager on the night of 9–10 July 2007 at Ferraz Station (62° S, 58° W), located on King George island on the Antarctic Peninsula. The observed wave propagated from ...

    • Observation of Electric-Field-Induced Structural Dislocations in a Ferroelectric Oxide 

      Evans, Donald; Småbråten, Didrik Rene; Holstad, Theodor Secanell; Vullum, Per Erik; Mosberg, Aleksander Buseth; Yan, Zewu; Bourret, Edith; Van Helvoort, Antonius; Selbach, Sverre Magnus; Meier, Dennis (Peer reviewed; Journal article, 2021)
      Dislocations are 1D topological defects with emergent electronic properties. Their low dimensionality and unique properties make them excellent candidates for innovative device concepts, ranging from dislocation-based ...

    • Observation of magnetic state dependent thermoelectricity in superconducting spin valves 

      Gonzalez-Ruano, C.; Caso, D.; Ouassou, Jabir Ali; Tiusan, C.; Lu, Y.; Linder, Jacob Wüsthoff; Aliev, Farkhad G. (Peer reviewed; Journal article, 2023)
      Superconductor-ferromagnet tunnel junctions demonstrate giant thermoelectric effects that are being exploited to engineer ultrasensitive terahertz radiation detectors. Here, we experimentally observe the recently predicted ...

    • Observation of Quasiperiodic Structures in the Hydroxyl Airglow on Scales Below 100 m 

      Franzen, Christoph; Espy, Patrick Joseph; Hibbins, Robert; Djupvik, Anlaug Amanda (Journal article; Peer reviewed, 2018)
      Gravity waves are known to transport energy and momentum to the middle atmosphere. The breaking processes associated with divergence of fluxes of energy and momentum into the atmosphere occur on scales that cannot be ...

    • Observation of the boson peak in a two-dimensional material 

      Tømterud, Martin; Eder, Sabrina Daniela; Büchner, Christin; Wondraczek, Lothar; Simonsen, Ingve; Schirmacher, Walter; Manson, Joseph R.; Holst, Bodil (Peer reviewed; Journal article, 2023)
      The boson peak is an excess in the phonon vibrational density of states relative to the Debye model. It has been observed in a wide range of amorphous materials, from inorganic glasses to polymers. Two-dimensional random ...

    • Observation of Unconventional Dynamics of Domain Walls in Uniaxial Ferroelectric Lead Germanate 

      Bak, Ohheum; Holstad, Theodor Secanell; Lu, Haidong; Evans, Donald; Hunnestad, Kasper Aas; Wang, Bo; Becker, Petra; Bohatý, Ladislav; Helvoort, Antonius T. J. van; Gregg, J Marty; Meier, Dennis Gerhard; Gruverman, Alexei (Peer reviewed; Journal article, 2020)
      Application of scanning probe microscopy techniques such as piezoresponse force microscopy (PFM) opens the possibility to re‐visit the ferroelectrics previously studied by the macroscopic electrical testing methods and ...

    • Observational evidence of the influence of Antarctic stratospheric ozone variability on middle atmosphere dynamics 

      Narukull, Venkateswara Rao; Espy, Patrick Joseph; Hibbins, Robert; Fritts, David C.; Kavanagh, Andrew J. (Journal article; Peer reviewed, 2015)
      Modeling results have suggested that the circulation of the stratosphere and mesosphere in spring is strongly affected by the perturbations in heating induced by the Antarctic ozone hole. Here using both mesospheric MF ...

    • Observations of gravity wave forcing of the mesopause region during the January 2013 major Sudden Stratospheric Warming 

      De Wit, Rosmarie Johanna; Hibbins, Robert; Espy, Patrick Joseph; Orsolini, Yvan; Limpasuvan, Varavut; Kinnison, Douglas E. (Journal article; Peer reviewed, 2014)
      Studies of vertical and interhemispheric coupling during Sudden Stratospheric Warmings (SSWs) suggest that gravity wave (GW) momentum flux divergence plays a key role in forcing the middle atmosphere, although observational ...

    • Observations of nitric oxide in the Antarctic middle atmosphere during recurrent geomagnetic storms 

      Newnham, David A.; Espy, Patrick Joseph; Clilverd, Mark A.; Rodger, Craig J.; Seppälä, Annika; Maxfield, David J.; Hartogh, Paul; Straub, Corinne; Holmén, Kim; Horne, Richard B. (Journal article; Peer reviewed, 2013)
      We report ground-based measurements of the polar middle atmosphere made using a 230–250 GHz passive microwave radiometer deployed at Troll station (72°01′S 02°32′E, L shell of L = 4.8), Antarctica. Our observations show ...

    • Observations of planetary waves in the mesosphere-lower thermosphere during stratospheric warming events 

      Stray, Nora Henriette; Orsolini, Yvan; Espy, Patrick Joseph; Limpasuvan, Varavut; Hibbins, Robert (Journal article; Peer reviewed, 2015-05-04)
      This study investigates the effect of stratospheric sudden warmings (SSWs) on planetary wave (PW) activity in the mesosphere–lower thermosphere (MLT). PW activity near 95 km is derived from meteor wind data using a chain ...

    • OC2017 A-181 - Numerical modelling of (thin) oil films - Improved behaviour and life time of thin films in the OSCAR model 

      Brönner, Ute; Lewis, Alun; Johansen, Øistein; Nordam, Tor (Research report, 2017)
      The PETRO MAKS project "Formation and behaviour of thin oil films and evaluation of response methods including HSE", in the following short "Thin oil films" has the objective to achieve new knowledge more efficient and ...

    • The occupied electronic structure of ultrathin boron doped diamond 

      Pakpour-Tabrizi, Alex; Schenk, Alex Kevin; Holt, Ann Julie; mahatha, s.k.; Arnold, Fabian; Bianchi, Marco; Jackman, Richard; Butler, J.E.; Vikharev, A; Miwa, Jill A.; Hofmann, Philip; Cooil, Simon; Wells, Justin W; Mazzola, Federico (Peer reviewed; Journal article, 2020)
      Using angle-resolved photoelectron spectroscopy, we compare the electronic band structure of an ultrathin (1.8 nm) δ-layer of boron-doped diamond with a bulk-like boron doped diamond film (3 μm). Surprisingly, the measurements ...

    • Octave-spanning Supercontinuum From As2S3-silica Double-nanospike Waveguide Pumped by Femtosecond Cr:ZnS Laser at 2.35 μm 

      Tolstik, Nikolai; Xie, Shangran; Sorokin, E.; Travers, J.; Troles, J.; Russell, Philip; Sorokina, Irina T (Chapter, 2015)
      We generate a 1.2 to 3.6 μm supercontinuum using a As2S3-silica double-nanospike waveguide pumped by femtosecond Cr:ZnS laser. Varying the core diameter allows the group velocity dispersion to be fine-tuned, thus maximizing ...

    • Octoxy capped Si nanoparticles synthesized by homogeneous reduction of SiCl4 with crown ether alkalide 

      Sletnes, Malin; Jerome, Maria; Grande, Tor; Lindgren, Mikael; Einarsrud, Mari-Ann (Journal article; Peer reviewed, 2014)
      Blue-green luminescent octoxy capped Si nanoparticles were synthesized via homogeneous reduction of SiCl4 with the crown ether alkalide K+(15-crown-5)2K− in tetrahydrofuran. The Si nanoparticles were characterized with ...

    • Odd-frequency superconductivity 

      Linder, Jacob; Balatsky, Alexander (Journal article; Peer reviewed, 2019)
      This article reviews odd-frequency (odd-ω) pairing with focus on superconducting systems. Since Berezinskii introduced the concept of odd frequency order in 1974 it has been viewed as an exotic and rarely occurring in ...

    • Oil dispersions of nano-layered silicates in an external electric field: An experimental study 

      Parmar, Kanak P.S (Doktoravhandlinger ved NTNU, 1503-8181; 2006:218, Doctoral thesis, 2006)
      The work in this thesis concerned with the experimental study of structural morphologies and rheological properties of chains and/or- column like-structures of electrorheological (ER) fluids of 2:1 synthetic nano-layered ...

    • Oil Spill Contingency and Response Modelling in Ice-Covered Waters 

      Nordam, Tor; Litzler, Emma; Rønningen, Petter; Aune, Joakim; Hagelien, Thomas Fjæstad; Beegle-Krause, Cynthia Juyne; Brönner, Ute (Chapter, 2018)

    • On dark atoms, massive dark photons and millicharged sub-components 

      Kahlhoefer, Felix; Urdshals, Einar (Peer reviewed; Journal article, 2020)
      We present a simple model of two dark matter species with opposite millicharge that can form electrically neutral bound states via the exchange of a massive dark photon. If bound state formation is suppressed at low ...