Author

J. van den Brink

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Preprint Nov 2026

Asymmetric Little--Parks Oscillations as a Probe of Coupled Pairing Channels in Surface-Superconducting \texorpdfstring{PtBi$_2$}{PtBi2}

Motivated by the recent discovery of unconventional surface superconductivity in PtBi$_{2}$, we theoretically study its signatures in the Little-Parks oscillations of a narrow ring made from the same material. Using a Ginzburg-Landau model with three coupled pairing channels allowed by the trigonal crystal symmetry, we...

Y. Yerin, S. Drechsler, C. Timm et al. · 0 citations

Preprint Oct 2026

Light-induced chiral altermagnets from conventional antiferromagnets

Altermagnets combine compensated collinear magnetic order with momentum-dependent nonrelativistic spin splitting, offering new opportunities for spintronic applications. Here, we propose a route to optically induce altermagnetism through coherent lattice control. Using symmetry analysis, we identify phonon distortions...

Jorge Cardenas-Gamboa, Devika Jayadeep, A. Leonardo et al. · 0 citations

Preprint Sep 2026

Tunable Chern superconductivity of PtBi$_2$ in slab geometry

Recent experiments indicate that PtBi$_2$ is a Weyl semimetal whose surfaces become topological superconductors with i-wave gap symmetry at low temperature. The bulk hosts 12 Weyl cones while in the superconducting state each of the two surfaces hosts in addition 6 Majorana cones. We study a simplified model in a slab...

Luca Ketmaier, J. van den Brink, I. C. Fulga · 0 citations