Browsing NTNU Open by Author "Rohling, Niklas"

Now showing items 1-4 of 4

    • 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 ...

    • Optimal choice of state tomography quorum formed by projection operators 

      Ivanova-Rohling, Violeta N.; Rohling, Niklas (Journal article; Peer reviewed, 2019)
      A minimal set of measurement operators for quantum state tomography has in the nondegenerate case ideally eigenbases which are mutually unbiased. This is different for the degenerate case. Here we consider the situation ...

    • Superconductivity at metal-antiferromagnetic insulator interfaces 

      Fjærbu, Eirik Løhaugen; Rohling, Niklas; Brataas, Arne (Peer reviewed; Journal article, 2019)
      Magnons in antiferromagnetic insulators couple strongly to conduction electrons in adjacent metals. We show that this interfacial tie can lead to superconductivity in a trilayer consisting of a metal sandwiched between two ...

    • Superconductivity induced by interfacial coupling to magnons 

      Rohling, Niklas; Fjærbu, Eirik Løhaugen; Brataas, Arne (Journal article; Peer reviewed, 2018)
      We consider a thin normal metal sandwiched between two ferromagnetic insulators. At the interfaces, the exchange coupling causes electrons within the metal to interact with magnons in the insulators. This electron-magnon ...