The combination of different exotic properties in materials paves the way for the emergence of their new potential applications. An example is the recently found coexistence of the mutually antagonistic ferromagnetism and superconductivity in hydrogenated boron-doped diamond, which promises to be an attractive system with which to explore unconventional physics. Here, we show the emergence of Yu-Shiba-Rusinov (YSR) bands with a spatial extent of tens of nanometers in ferromagnetic superconducting diamond using scanning tunneling spectroscopy. We demonstrate theoretically how a two-dimensional (2D) spin lattice at the surface of a three-dimensional (3D) superconductor gives rise to the YSR bands, and how their density-of-states profile correlates with the spin lattice structure. The established strategy to realize new forms of the coexistence of ferromagnetism and superconductivity opens a way to engineer the unusual electronic states and also to design better performing superconducting devices.
@article{arxiv.2006.02853,
title = {Yu-Shiba-Rusinov bands in ferromagnetic superconducting diamond},
author = {Gufei Zhang and Tomas Samuely and Naoya Iwahara and Jozef Kačmarčík and Changan Wang and Paul W. May and Johanna K. Jochum and Oleksandr Onufriienko and Pavol Szabó and Shengqiang Zhou and Peter Samuely and Victor V. Moshchalkov and Liviu F. Chibotaru and Horst-Günter Rubahn},
journal= {arXiv preprint arXiv:2006.02853},
year = {2020}
}