149 citations · 322 across the 10 of their papers we have counts for
10 papers
Topological hydrodynamics in spin-triplet superconductors
Chau Dao, Eric Kleinherbers, Bjørnulf Brekke +1
Due to the structure of the underlying SO(3) -vector order parameter, spin triplet superconductors exhibit a bulk-edge correspondence linking the circulation of supercur…
Shear Strain-Induced Multiferroic Response in the Altermagnetic Semiconductor CuFeS
Roman Malyshev, Bjørnulf Brekke, Ingeborg-Helene Svenum +4
CuFeS is an altermagnetic semiconductor that is lattice-matched with silicon and has a high Néel temperature. It is nonpolar and magnetically compensated in its structural grou…
Coexistence of -wave magnetism and superconductivity
Pavlo Sukhachov, Hans Gløckner Giil, Bjørnulf Brekke +1
The symmetry requirements for realizing unconventional compensated magnets with spin-polarized bands such as altermagnets have recently been uncovered. The most recent addition to…
Minimal Models and Transport Properties of Unconventional -Wave Magnets
Bjørnulf Brekke, Pavlo Sukhachov, Hans Gløckner Giil +2
New unconventional compensated magnets with a -wave spin polarization protected by a composite time-reversal translation symmetry have been proposed in the wake of altermagnets.…
Chirality-Driven Orbital Angular Momentum and Circular Dichroism in CoSi
Stefanie Suzanne Brinkman, Xin Liang Tan, Bjørnulf Brekke +15
Chiral crystals and molecules were recently predicted to form an intriguing platform for unconventional orbital physics. Here, we report the observation of chirality-driven orbital…
Quasiclassical theory of superconducting spin-splitter effects and spin-filtering via altermagnets
Hans Gløckner Giil, Bjørnulf Brekke, Jacob Linder +1
Conducting altermagnets have recently emerged as intriguing materials supporting strongly spin-polarized currents without magnetic stray fields. We demonstrate that altermagnets en…
Many-body effects on superconductivity mediated by double-magnon processes in altermagnets
Kristian Mæland, Bjørnulf Brekke, Asle Sudbø
Altermagnets exhibit a large electron spin splitting which can be understood as a result of strong coupling between itinerant electrons and localized spins. We consider superconduc…
Two-dimensional altermagnets: Superconductivity in a minimal microscopic model
Bjørnulf Brekke, Arne Brataas, Asle Sudbø
We propose a minimal toy model for a two-dimensional altermagnet. The model unravels altermagnetic properties at a microscopic level. We find spin-split electron- and non-degenerat…
Interfacial Magnon-Mediated Superconductivity in Twisted Bilayer Graphene
Bjørnulf Brekke, Asle Sudbø, Arne Brataas
The interfacial coupling between electrons and magnons in adjacent layers can mediate an attractive electron-electron interaction and induce superconductivity. We consider magic-an…
Low-energy Properties of Electrons and Holes in CuFeS
Bjørnulf Brekke, Roman Malyshev, Ingeborg-Helene Svenum +4
The antiferromagnetic semiconductor CuFeS belongs to a magnetic symmetry class that is of interest for spintronics applications. In addition, its crystal lattice is compatible…