8 papers
Nanoparticle Arrays for Efficient Organic Light-Emitting Diode Emission Management
Aron J. J. Dahlberg, Matas Gužauskas, Malek Mahmoudi +16
The paper demonstrates that embedding plasmonic nanoparticle arrays in OLED layers can boost light outcoupling and control the direction and polarization of emission, achieving up…
Magnetic Field Walls in Flat-band Superconductors
Guodong Jiang, Aaron Dunbrack, Tero T. Heikkilä +1
Superconductors of different types have distinct magnetic properties; for example, they can form Abrikosov vortices or alternating normal-superconducting domains. We predict that,…
Ab-initio superfluid weight and superconducting penetration depth
Kaja H. Hiorth, Martin Gutierrez-Amigo, Théo Cavignac +3
Machine learning and high-throughput screening approaches to superconductor discovery require physically meaningful descriptors that capture essential physics while remaining compu…
Flat Bands from Diffraction in Periodic Systems
Joel Lehikoinen, Rebecca Heilmann, Aron J. J. Dahlberg +5
Periodic photonic structures enable precise control over the light-matter interaction through band structure engineering. Certain lattice geometries exhibit dispersionless flat ban…
Superfluid weight in disordered flat-band superconductors as a competition between localization functionals
KryÅ¡tof KoláÅ, Kryštof Kolář, Tero T. Heikkilä +3
According to Anderson's theorem, the gap of a time-reversal symmetric weak-coupling superconductor is unaffected by non-magnetic disorder. However, the superfluid weight (stiffness…
Ideal quantum geometry of the surface states of rhombohedral graphite and its effects on the surface superconductivity
Guodong Jiang, Tero Heikkilä, Päivi Törmä
The interplay of quantum geometry and interactions determines the correlated state properties of flat bands. Here, we investigate the ideal quantum geometry (IQG), i.e., the proper…