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cond-mat.mes-hall2026
Cooper quartets and fractional vortices in frustrated Josephson junction dice arrays
Erik Lennart Weerda, Olav F. Syljuåsen, Matteo Rizzi +1
Superconductivity mediated by Cooper quartets of charge 4e is a phenomenon of key importance for both the understanding of certain exotic superconductors and the engineering of qua…
cond-mat.str-el2026
Weak first-order phase transition out of the classical kagome spin liquid
Cecilie Glittum, Olav F. Syljuåsen
The low-temperature fate of the spin-liquid regime in the classical kagome Heisenberg antiferromagnet has been debated for over three decades. Using an expansion in the number of s…
cond-mat.str-el2026
Nematostriction in frustrated two-dimensional Heisenberg models
Olav F. Syljuåsen, Jens Paaske
We investigate the nematic phase transition in the Heisenberg --model on square and triangular lattices, accounting for finite lattice compressibility and bond-length-dep…