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TT: Fachverband Tiefe Temperaturen
TT 29: Unconventional Superconductors
TT 29.10: Vortrag
Dienstag, 10. März 2026, 12:00–12:15, CHE/0091
Effects of YIG exchange field on TMDC superconductor NbSe2 — •Alfredo Spuri1, Marcin Faitsch1, Christian Wiedemann1, Wolfgang Belzig1, Elke Scheer1, and Angelo Di Bernardo1,2 — 1Universität Konstanz, Konstanz, Germany — 2Univeristà degli studi di Salerno, Fisciano, Italy
Yttrium iron garnet (YIG) [1] is a heavily investigated material for application in spintronic devices as a ferromagnet with high critical temperature (TC ∼ 560 ∘C), insulating properties due to a large bandgap of ∼ 2.85 eV, and a strong local in-plane exchange field (Hex ∼ 102 T). Coupling YIG with a natural 2D Ising superconductor like NbSe2, with a very high in-plane critical field (HC ∼ 40 T in the monolayer limit) [2], offers the possibility of novel unconventional superconducting states.
We have assembled YIG/NbSe2 heterostructures and investigated their superconducting properties. NbSe2 with a YIG flake on top reveals features in the TC(B) curve that are not found on bare NbSe2, We tentatively attribute the features in the heterostructures to scattering between two different energy bands in NbSe2, enhanced by the strong exchange field of the YIG.
[1] R. Hartmann et al., APL Mater. 12, 031121 (2024).
[2] X. Xi et al., Nature Phys. 12, 139 (2016).
Keywords: YIG; TMDC; Band Scattering