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Sökning: WFRF:(Flipse J)

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  • Flipse, C. F. J, et al. (författare)
  • XPS study of the new superconductor Nd-Ce-Cu-O
  • 1989
  • Ingår i: Physica C: Superconductivity. - : Elsevier BV. - 0921-4534. ; 162-164:2, s. 1389-1390
  • Tidskriftsartikel (refereegranskat)abstract
    • In this paper we present XPS and Auger measurements on Nd1.85Ce0.15CuO3.96 and its parent material. These measurements show that electron doping, by substitution of Ce4+ in the case of Nd3+, results in a filling of the Cu 3d9 states. So the Ce doped compound will have a higher 3d10 contribution. The intensity of the Cu-2p satellite is very low for this new superconductor with respect to the high-Tc superconductors.
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  • Nguyen, Thi Thuy Nhung, et al. (författare)
  • Topological Surface State in Epitaxial Zigzag Graphene Nanoribbons
  • 2021
  • Ingår i: Nano Letters. - : American Chemical Society (ACS). - 1530-6992 .- 1530-6984. ; 21:7, s. 2876-2882
  • Tidskriftsartikel (refereegranskat)abstract
    • Protected and spin-polarized transport channels are the hallmark of topological insulators, coming along with an intrinsic strong spin-orbit coupling. Here we identified such corresponding chiral states in epitaxially grown zigzag graphene nanoribbons (zz-GNRs), albeit with an extremely weak spin-orbit interaction. While the bulk of the monolayer zz-GNR is fully suspended across a SiC facet, the lower edge merges into the SiC(0001) substrate and reveals a surface state at the Fermi energy, which is extended along the edge and splits in energy toward the bulk. All of the spectroscopic details are precisely described within a tight binding model incorporating a Haldane term and strain effects. The concomitant breaking of time-reversal symmetry without the application of external magnetic fields is supported by ballistic transport revealing a conduction of G = e2/h.
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  • Resultat 1-4 av 4

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