Multiband strong-coupling superconductors with spontaneously broken time-reversal symmetry

NH Aase, K Mæland, A Sudbø - Physical Review B, 2023 - APS
We study superconducting three-band systems within strong-coupling Eliashberg theory. In
particular, we search for phase-frustrated superconducting systems with spontaneous time …

Many-body effects on superconductivity mediated by double-magnon processes in altermagnets

K Mæland, B Brekke, A Sudbø - Physical Review B, 2024 - APS
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 …

Strong-coupling approach to temperature dependence of competing orders of superconductivity: Possible time-reversal symmetry breaking and nontrivial topology

C Sun, K Mæland, E Thingstad, A Sudbø - Physical Review B, 2024 - APS
We use strong-coupling Eliashberg theory to study the competition of separate
superconducting orders at low temperatures. Specifically, we study magnon-mediated …

Many-body effects and topology in magnets and superconductors

K Mæland - 2024 - ntnuopen.ntnu.no
Solid materials where quantum mechanical effects dominate the behavior can contribute to
faster and more energy-efficient computers. The road to technological application starts with …