Giant shot noise in superconductor/ferromagnet junctions with orbital-symmetry- controlled spin-orbit coupling.

ABSTRACT: By measuring the shot noise, a consequence of charge quantization, in super-conductor/insulator/ferromagnet (V/MgO/Fe) junctions, we discover a giant increase, orders of magnitude larger than expected. The origin of this giant noise is a peculiar realization of a superconducting proximity effect, where a simple superconductor influences its neighbors. Our measurements reveal largely unexplored implications of orbital-symmetry-controlled proximity effects. The importance of orbital symmetries and the accompanying spin-orbit coupling is manifested by an unexpected emergence of another superconducting region, strikingly different from the parent superconductor. Unlike vanadium's common spin-singlet superconductivity, the broken inversion symmetry in V/MgO/Fe junctions and the resulting interf

SUBMITTER: Gonzalez-Ruano C 

PROVIDER: S-EPMC12569168 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature