Browsing Institutt for fysikk by Title

Now showing items 2728-2736 of 2736

    • Z2 characterization for three-dimensional multiband Hubbard models 

      Irsigler, Bernhard; Zheng, Jun-Hui; Grusdt, Fabian; Hofstetter, Walter (Peer reviewed; Journal article, 2020)
      We introduce three numerical methods for characterizing the topological phases of three-dimensional multiband Hubbard models based on twisted boundary conditions, Wilson loops, as well as the local topological marker. We ...

    • Zernike phase contrast in high-energy x-ray transmission microscopy based on refractive optics 

      Falch, Ken Vidar; Lyubormiskiy, Mikhail; Casari, Daniele; Snigirev, Anatoly; Snigireva, Irina; Detlefs, Carsten; Di Michiel, Marco; Lyatun, Ivan; Mathiesen, Ragnvald (Journal article; Peer reviewed, 2018)
      The current work represents the first implementation of Zernike phase contrast for compound refractive lens based x-ray microscopy, and also the first successful Zernike phase contrast experiment at photon energies above ...

    • Zero temperature superconductor–edge metal–insulator transition in two-dimensional bosonic systems 

      Haugen, Håvard Homleid; Sudbø, Asle (Peer reviewed; Journal article, 2022)
      Motivated by the recent experimental observation of an intermediate bosonic metallic state in the two-dimensional superconductor-insulator transition at T = 0 , we study an extended Bose-Hubbard model in the limit of a ...

    • Zigzag-Shaped Superlattices on the Basis of Graphene Nanoribbons: Structure and Electronic Properties 

      Saroka, Vasil; Batrakov, K.G. (Journal article; Peer reviewed, 2016)
      The paper focuses on superlattices consisting of two coplanar fragments of one-layer graphene nanoribbons that have different width and are connected at an angle. Classification of such superlattices was carried out; their ...

    • µSR study of Al-0.67%Mg-0.77%Si alloys 

      Nishimura, Katsuhiko; Matsuda, Kenji; Komaki, R; Nunomura, Norio; Wenner, Sigurd; Holmestad, Randi; Matsuzaki, Teiichiro; Watanabe, Isao; Pratt, Francis L.; Marioara, Calin Daniel (Journal article; Peer reviewed, 2014)
      Zero-field muon spin relaxation measurements were carried out with Al-0.67%Mg- 0.77%Si alloys in the temperature range from 20 K to 300 K. Observed relaxation spectra were compared with the relaxation functions calculated ...

    • Æther as an Inevitable Consequence of Quantum Gravity 

      Cherkas, Sergey; Kalashnikov, Vladimir (Peer reviewed; Journal article, 2022)
      The fact that quantum gravity does not admit an invariant vacuum state has far-reaching consequences for all physics. It points out that space could not be empty, and we return to the notion of an æther. Such a concept ...

    • α-Mg primary phase formation and dendritic morphology transition in solidification of a Mg-Nd-Gd-Zn-Zr casting alloy 

      Casari, Daniele; Mirihanage, Wajira; Falch, Ken Vidar; Ringdalen, Inga Gudem; Friis, Jesper; Schmid-Fetzer, Rainer; Zhao, Dongdong; Li, Yanjun; Sillekens, Wim H.; Mathiesen, Ragnvald (Journal article; Peer reviewed, 2016)
      Microstructure evolution in the commercial Mg-Nd-Gd-Zn-Zr alloy Elektron 21, solidified under nearly isothermal conditions, has been studied via in-situ X-ray radiography. For cooling rates View the MathML source≤0.075 ...

    • β- and δ-Al-Fe-Si intermetallic phase, their intergrowth and polytype formation 

      Becker, Hanka; Bergh, Tina; Vullum, Per Erik; Leineweber, Andreas; Li, Yanjun (Journal article; Peer reviewed, 2019)
      Crystal structure characteristics of coexisting β and δ phase were investigated in a purely intermetallic Al-Fe-Si alloy and in plate-shaped intermetallic particles formed in a model secondary Al7.1Si1.2Fe0.3Mn alloy. The ...

    • β-(1 → 3)(1 → 6)glucan from Schizophyllum commune 227E.32: High yield production via glucose/xylose co-metabolization 

      Vanin, Ana Paula; Visentin, Esther Ziliotto; Fontana, Roselei Claudete; di Medeiros Leal, Maria Carolina Bezerra; de Avila e Silva, Scheila; Stokke, Bjørn Torger; Carbonero, Elaine Rosechrer; Camassola, Marli (Peer reviewed; Journal article, 2023)
      A co-metabolization of xylose and glucose by Schizophyllum commune 227E.32 wild mushroom for exopolysaccharide (EPS) production is presented. Cultivations performed with S. commune 227E.32 at different xylose concentrations ...