Dresden 2026 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 29: Unconventional Superconductors
TT 29.4: Vortrag
Dienstag, 10. März 2026, 10:15–10:30, CHE/0091
Boundary critical temperature in unconventional superconductors and effects of impurities — •David Haink1,2 and Benedikt Fauseweh1,2 — 1High-performance Computing, Institute of Software Technology, German Aerospace Center (DLR), 51147 Cologne, Germany — 2Condensed Matter Theory, TU Dortmund University, Otto-Hahn-Straße 4, 44227 Dortmund, Germany
In BCS theory, s-wave superconductors have a higher critical temperature at their boundaries than in their bulk [PRB 101, 134512 (2020)]. We show that this boundary behavior does not hold for p-wave, but for d-wave superconductors and for coexisting phases. We further investigate the effects of randomly distributed impurities in the chemical potential on the critical temperature of the edge.
Keywords: BCS theory; Mean-field theory; Boundary critical temperature; Bogoliubov-de-Gennes approach; Tight-binding model