Signatures of a spin-active interface and locally enhanced Zeeman field in a superconductor-chiral material heterostructure

A localized Zeeman field intensified at heterostructure interfaces, could play a crucial role in a broad area including spintronics and unconventional superconductors. Conventionally, the generation of a local Zeeman field is achieved through magnetic exchange coupling with a magnetic material. However, magnetic elements often introduce defects, which could weaken or destroy superconductivity. Alternatively, the coupling between a superconductor with strong spin-orbit coupling and a non-magnetic chiral material could serve as a promising approach to generate a spin-active interface. In this study, we leverage an interface superconductor, namely induced superconductivity in noble metal surface states, to probe the spin-active interface. Our results unveil an enhanced interface Zeeman field, which selectively closes the surface superconducting gap while preserving the bulk superconducting pairing. The chiral material, i.e., trigonal tellurium, also induces Andreev-bound states (ABS) exhib..., , , # Signatures of a spin-active interface and locally enhanced Zeeman field in a superconductor-chiral material heterostructure

[https://doi.org/10.5061/dryad.4xgxd25jf](https://doi.org/10.5061/dryad.4xgxd25jf)

The data set has three parts. The \"ManuscriptFigures3-29-24.opju\" contains all tunneling and transport data. The \"GIXRDdata.zip\" contains all grazing incidence x-ray data. The \"resonator_data.opju\" contains all microwave resonator data. The data is collected through LabView software and saved as .txt files on computers.

## Description of the data and file structure

The ManuscriptFigures3-29-24.opju file contains all tunneling and transport measurement data. It can be opened using standard Origin software. The raw data is saved in each workbook in the Origin file. The columns in the workbook are labeled accordingly for example \"Vbias\", which means the bias voltage in tunneling measurement. All workbook columns corresponding to \"Vbias\" are the dI/dV differential conductance data....